Top Naperville Anniversary Party Venues

1,210 results near Naperville, IL

Find a Venue

Choosing your anniversary party venue will be one of the most important steps in the planning process. So much goes into finding the perfect venue in Naperville. You’ll want to consider everything from the aesthetics of the space to any in-house amenities and services. Luckily, PartySlate makes it easy with our Find Venues page. Use the filters to narrow your search — taking into account everything from your guest count to specific catering preferences. Once you’ve set your filters, scroll down to search our curated list. Look for the “featured” tag for PartySlate’s top recommendations. With PartySlate, finding your ideal Naperville venue has never been easier.

Results

  • featured

    Ignite Glass Studios

    401 N Armour St, Chicago, IL 60642, USA
    • Spaces for 150-400 Guests
    • 2 Outdoor Spaces
    • 1 Event Space

    Ignite Chicago is one of the top 5 glass studios in the country, which has working glass blowers, hosts all types of events including weddings, corporate functions, non-profit events to corporate team building. Our unique event spaces include an industrial loft like space with a wall of glass doors to an urban garden and a rooftop deck with amazing views of the Chicago skyline. No matter what type of event you're hosting, Ignite Chicago can accommodate your every need and create an event you'll never forget. The vision behind Ignite Glass Studios is connecting people back to the process of creating art and engaging in the beauty of the time-honored craft of glass blowing and the exquisite art it produces along with building a new sense of community through the interactive experience of blowing glass and glass making. Ignite Glass Studios is a thriving glass art community in a space where artists can create and grow, novices can experiment and learn, and young people’s lives are transformed by the power of this collaborative art form. Ignite sparks the imagination and the creation of amazing works of art, creates a space for unique, memorable events, and opens opportunities for individual growth in a learning community that values difference, participation and collaboration. Providing a safe place for youth to explore, grow and draw inspiration is a fundamental element of Ignite’s vision. Ignite Glass Studios’ commitment to strengthening community is enhanced by its partnership with Ignition Community Glass (ICG), a non-profit serving Chicago’s youth through the arts. ICG leverages the power of hands-on glass making to foster positive youth development and offer youth from Chicago’s under-resourced communities’ access to this powerful art form.

    $6,000 min
    Avg response time 6-12 hrs
  • featured
    Featured photo from Museum of Contemporary Art Chicago

    Museum of Contemporary Art Chicago

    220 E Chicago Ave, Chicago, IL 60611, USA
    • Spaces for 100-1,000 Guests
    • 4 Museums
    • 1 Landmark
    • 4 Total Spaces

    The Museum of Contemporary Art in Chicago is an engaging and provocative space that serves as an ideal venue for your private events. The MCA’s iconic, modern building is conveniently located in the heart of downtown Chicago, and is perfectly suited for weddings, corporate, and non-profit events in search of an inspiring, artistic locale. The museum space, designed by Josef Paul Kleihues, is both an innovative and accommodating environment for your event. Our west-facing, four-story windows create both a luminous interior space and panoramic view of Chicago’s skyline. The spacious Kovler Atrium is great for large celebrations, while our galleries allow for unique and intimate experiences where guests can socialize amongst some of the world’s most celebrated contemporary art.

    $10,000 min
    Avg response time 12-24 hrs
  • featured
    Featured photo from Four Seasons Hotel Chicago

    Four Seasons Hotel Chicago

    120 E Delaware Pl, Chicago, IL 60611, USA
    • Spaces for 80-750 Guests
    • 4 Hotels
    • 5 Ballrooms
    • 5 Total Spaces

    Weddings come to life eight stories up in the Grand Ballroom at Four Seasons, where spacious elegance and a grand staircase set an impressive stage for your most important day. You and your guests can relax and enjoy everything the Hotel has to offer while our tenured event staff pays expert attention to every wedding detail. Rising from the Magnificent Mile in the heart of the Gold Coast neighborhood, Four Seasons Hotel Chicago is the destination for the city‘s most unforgettable weddings. Say “I do” surrounded by family and friends in the glamorous eighth-floor Grand Ballroom. For a more intimate experience, exchange vows in Lakeview, named for its beautiful vistas of Lake Michigan. Rely on our expert culinary team to curate an unforgettable menu, while our tenured wedding specialist brings your dream to life. IDYLLIC VENUES - From elegant ceremonies in the bespoke Grand Ballroom to intimate gatherings in the sophisticated Lakeview, we’ve got the perfect venue for your wedding day. INCLUSIVE WEDDING PACKAGES - Let us take care of the details for you. Our thoughtfully curated wedding packages include all of the elements you need to host your dream celebration, always executed with signature Four Seasons Hotel Chicago hospitality. EXPERT WEDDING PLANNING - From the welcome reception to your customized wedding cake, our wedding specialist works with you to incorporate your dream details and signature Chicago style into your celebration.

    Est. $445/guest
    Pricing Details Available
    Avg response time 12-24 hrs
  • featured
    Featured photo from The Westin Michigan Avenue Chicago

    The Westin Michigan Avenue Chicago

    909 N Michigan Ave, Chicago, IL 60611, USA
    • Spaces for 200-600 Guests
    • 3 Hotels
    • 3 Ballrooms
    • 3 Total Spaces

    Located in the heart of Chicago’s iconic Gold Coast, The Westin Michigan Avenue is a premier destination for luxury weddings, corporate events, social gatherings, and private parties. Just steps from the Magnificent Mile, our hotel offers convenient access to top attractions like Navy Pier, The Art Institute of Chicago, Grant Park, and upscale shopping and dining. With over 36,000 square feet of flexible event space, including 20 meeting rooms and the stunning Great Lakes Grand Ballroom, we can accommodate everything from large-scale weddings and galas to intimate bridal showers, rehearsal dinners, and boardroom meetings. Our light-filled venues feature skyline views, custom layouts, and premium amenities that create the perfect backdrop for any celebration or conference. Let our experienced Chicago wedding planners and event coordinators help you bring your vision to life. From personalized event planning and award-winning catering to on-site spa services at Body Rituals Boutique Spa, we offer a full-service experience for your special day or corporate occasion. Whether you’re planning a downtown Chicago wedding, a corporate retreat, or a milestone celebration, The Westin Michigan Avenue delivers impeccable service, modern elegance, and a prime location. Ask about our wedding packages, group rates, and event promotions today.

    Est. $190/guest
    $13,000 min
    Avg response time 12-24 hrs
  • featured
    Featured photo from Shore Club Chicago

    Shore Club Chicago

    1603 N Lake Shore Dr, Chicago, IL 60610, USA
    • Spaces for 100-1,200 Guests
    • 2 Restaurants
    • 3 Bars
    • 3 Total Spaces

    Nestled along Chicago's iconic North Avenue Beach, Shore Club Chicago offers a one-of-a-kind lakefront setting for weddings, corporate events, brand activations, and social celebrations. Just minutes from downtown, the venue seamlessly blends coastal-inspired design with the energy of the city, creating a destination that feels like a beachside escape in the heart of Chicago. With versatile indoor and outdoor event spaces, panoramic views of Lake Michigan, and customizable food and beverage experiences, Shore Club accommodates everything from intimate gatherings to large-scale receptions and experiential events. Whether hosting a waterfront wedding, corporate celebration, networking event, or private party, guests enjoy elevated hospitality, vibrant cuisine, and an unforgettable setting that captures the spirit of a Chicago summer.

    Est. $58/guest
    Avg response time 2-4 hrs
  • featured
    Featured photo from Allium

    Allium

    333 N Ogden Ave, Chicago, IL 60607, USA
    • Spaces for 200-300 Guests
    • 1 Outdoor
    • 2 Event Spaces

    A Blue Plate Experience Perched above the energy of Fulton Market - Chicago’s hub for style, innovation, and culture - Allium is a vibrant new event venue from the team at Blue Plate. Defined by architectural elegance and framed by sweeping skyline views, Allium offers a rare balance of refinement and flexibility. Seamless indoor and outdoor spaces create a canvas for extraordinary gatherings, from timeless weddings and landmark celebrations to polished corporate and nonprofit events. As the latest chapter in Blue Plate’s tradition of culinary excellence and gracious hospitality, Allium is more than a venue - it’s a destination where design, service, and experience converge to create moments of lasting beauty.

    Avg response time 12-24 hrs
  • featured
    Featured photo from Wildwood Studio

    Wildwood Studio

    2138 W Roscoe St, Chicago, IL 60618, USA
    • Spaces for 22-75 Guests
    • 1 Event Space

    WIldwood Studio is a stunning modern and versatile 2000 sq ft photography studio located in the heart of Roscoe Village and is available to hire for both photography as well as events with capacity of 75. Wildwood Studio was designed to resemble a cozy Montana mountain home that makes everyone feel amazing as soon as they walk in. We have thrown countless baby showers, bridal showers, after-hours networking events, classes, neighborhood mom meet-ups, pop-up shops for all the different brands we love, and we even have a wedding reception in the space this spring! It is truly a magical place where you don’t have to bring in additional decorations for your event because of Sarah’s style. Having said that we have worked with some amazing stylist to really make the space just as you would like. So you really can do as much or as little as you wish. Wildwood Studio has 3 separate sitting areas to spread people through out the space, a kitchen, a table for 8 as well as additional tables and not forget our cozy fire place. More details: - 2130 sq ft - 12' Ceilings - Natural Light - Free WiFi - AC/Heat - Hand Held Steamer - Microwave available for use - 2 Folding Tables (4 foot and 6 foot) with 6 additional folding chairs - 25 chairs total, 5 stools, 1 couch, 1 loveseat and 1 daybed/bench - easy access to the CTA Brown Line - Free Parking out front and on side streets

    $850 min
    Avg response time 12-24 hrs
  • featured
    Featured photo from Experience 868

    Experience 868

    868 N Franklin St, Chicago, IL 60610, USA
    • Spaces for 8-250 Guests
    • 3 Restaurants
    • 2 Bars
    • 5 Total Spaces

    Where style meets versatility in the heart of Chicago. From intimate ceremonies to grand receptions, our venue is designed for unforgettable occasions. We combine timeless architecture with flawless service to ensure every detail of your day is handled with expertise. Explore our distinctive spaces and consider a private Wine Cellar Experience for an elevated rehearsal dinner or a unique cocktail hour. This is where your perfect event becomes a personal, memorable, and effortlessly exceptional reality.

    Avg response time 2-4 hrs
  • featured
    Featured photo from Venue SIX10

    Venue SIX10

    610 S Michigan Ave, Chicago, IL 60605, USA
    • Spaces for 50-1,000 Guests
    • 5 Event Spaces

    Venue SIX10 offers stunning architecture and outstanding hospitality for clients ranging from wedding couples, Fortune 500s, non-profits and entrepreneurs. What sets Venue SIX10 apart is its jaw-dropping 10-story faceted window wall that provides panoramic views of Chicago’s skyline, Grant Park, Lake Michigan, Buckingham Fountain, Navy Pier, the Museum Campus, and even Indiana on a clear day. With numerous design awards, Silver LEEDs certification, catering provided by a select group of Chicago’s finest caterers, and impeccable service, Venue SIX10 delivers an experience second to none. There are four main event spaces and 13 additional breakout spaces within Venue SIX10, offering unique options for events from 12 to 800 people. With the help of the Event Sales Team and Production Team, Venue SIX10 is a full-service venue that ensures your event is executed seamlessly.

    $6,750 min
    Pricing Details Available
  • Featured photo from Heritage Prairie Farm

    Heritage Prairie Farm

    2N308 Brundige Rd, Elburn, IL 60119, USA
    • Spaces for 250 Guests
    • 2 Barns
    • 2 Farms
    • 1 Event Space

    As mother nature sets the perfect backdrop, picture celebrating your special day on a beautiful Certified Organic Farm. Heritage Prairie Farm is truly an all-inclusive outdoor wedding venue, conveniently located in the Fox Valley city Elburn IL, near Chicago. We have been hosting farm-to-table garden and barn weddings here in Elburn for over ten years and we pride ourselves on working with our couples to create stress-free, customized dream weddings. Without a doubt, every aspect of our planning process revolves around providing a warm hospitality, impeccable service, and delicious customized gourmet cuisine. As we carefully craft the look and feel of our special farm weddings, you’ll experience, first hand, the team’s unparalleled attention to detail. Additionally, we are truly passionate about making every part of the planning process a joyful time of celebration. We hope you reach out to us to schedule a tour of our outdoor wedding venue and see how Heritage Prairie Farm makes you and your guests feel at home.

    Est. $120/guest
  • featured
    Featured photo from Verve Wine

    Verve Wine

    2349 N Lincoln Ave, Chicago, IL 60614, USA
    • Spaces for 12-80 Guests
    • 2 Event Spaces
    • 2 Meeting Spaces

    Discover our hidden gem in the heart of Chicago. Our elegant venue, seamlessly connected to our wine shop, is the perfect backdrop for your private event. Whether it’s an intimate dinner, wine tasting, or large-scale event, we partner with top-tier caterers and in-house sommeliers to ensure every detail is exquisite. Experience the blend of elegance and excellence and let us create a memorable event people won't stop talking about!

    Pricing Details Available
  • featured
    Featured photo from The Art Institute of Chicago

    The Art Institute of Chicago

    111 S Michigan Ave, Chicago, IL 60603, USA
    • Spaces for 40-1,100 Guests
    • 3 Restaurants
    • 13 Museums
    • 14 Total Spaces

    Founded in 1879, the Art Institute of Chicago is one of the world’s major museums, housing an extraordinary collection of objects from across places, cultures, and time. We are also a place of active learning for all—dedicated to investigation, innovation, education, and dialogue—continually aspiring to greater public service and civic engagement. From gardens to galleries, Gilded Age glamour to modern minimalism, the Art Institute of Chicago has several exceptional spaces that can accommodate a variety of special occasions. Whether you’re hosting an elegant seated dinner, the wedding of your dreams, or a theater meeting, the museum has the perfect venue to suit your needs. With the help of our professional planning experts, you can create an event that your guests won’t soon forget.

    $12,000 min
    Pricing Details Available
    Avg response time 1-2 days
  • Featured photo from Bellazevents

    Bellazevents

    Joliet, IL, USA

    VENEISHA, VENUE OWNER, EVENT PLANNER + DESIGNER Veneisha is passionate about and committed to helping people. She is a connector who loves to bring people together. In and out of her professional life, she is always finding herself in the middle of planning fun and memorable events for the people around her. She has leveraged her experience working with different planners into creating a coordination style that is unique. She specializes in personalizing diverse events for each client and handling stressful event situations with grace. Her signature is creative and tasteful designs with incredible attention to detail and structured + logistical event flow. Clients who choose to work with Veneisha appreciate her candor, caring personality, and sincerity. She is proud to be friends with previous clients. Veneisha takes greatest satisfaction in seeing everyone happy and is always grateful for the opportunity to make greatness happen. Veneisha loves spending quality time with her four beautiful kids, and Husband. Trying new things, and traveling, is one of the best things she loves to do in her free time.

    Est. $31/guest
    $500 min
  • featured
    Featured photo from David Rubenstein Forum

    David Rubenstein Forum

    1201 E 60th St, Chicago, IL 60637, USA
    • Spaces for 6-1,200 Guests
    • 3 Restaurants
    • 1 Bar
    • 12 Total Spaces

    Discover the epitome of elegance and versatility at the David Rubenstein Forum, nestled within the vibrant University of Chicago campus. Our stunning venue is perfect for a variety of events, from corporate meetings to dream weddings. With its impressive floor-to-ceiling windows offering breathtaking views of Hyde Park and state-of-the-art audiovisual support available throughout ten floors, your event experience will be enhanced in every way. Choose from versatile spaces like the expansive 600+ seat University Room or intimate sections designed for memorable receptions. Enjoy exceptional seasonal cuisine crafted by Executive Chef Marco Bahena in our Dining Room or BARDAVID while surrounded by inspiring biophilic design elements such as the serene Bosque Garden and surrounding landscape that invite nature indoors. Whether you're planning a conference, festival, or personal celebration, the David Rubenstein Forum provides an unparalleled backdrop that fosters connection and creativity among all guests.

    Est. $159/guest
    Avg response time 12-24 hrs
  • featured
    Featured photo from Boulder Ridge Country Club

    Boulder Ridge Country Club

    350 Boulder Dr, Lake in the Hills, IL 60156, USA
    • Spaces for 60-600 Guests
    • 4 Ballrooms
    • 1 Outdoor
    • 4 Total Spaces

    We're so glad you're here, welcome to Boulder Ridge! Located in stunning Lake in the Hills, IL we pride ourselves on being the premier event space in the Northwest Suburbs of Chicago. Your experience and that of your guests will be expertly tailored to your desires by our passionate event team. We couldn't be more excited to be a part of your special occasion; click on a link below and let's get started!

    Avg response time 12-24 hrs
  • featured
    Featured photo from Skylight Room at Rizzo's

    Skylight Room at Rizzo's

    3658 N Clark St, Chicago, IL 60613, USA
    • Spaces for 30-400 Guests
    • 3 Restaurants
    • 3 Bars
    • 3 Total Spaces

    Looking for a unique location? Is hosting a special event at the renowned Wrigley Field on your bucket list? Your best option is The Skylight Room at Rizzo's! Three full-service bars, 28 LED TVs, one 13-foot LED screen, a patio with a retractable roof, and heated floors are just a few of the special features of our venue. There is plenty of space for your visitors to fit comfortably while still adhering to existing gathering limits, thanks to the twenty-foot ceilings and 8,500+ square feet of open air area.

    $13,000 min
    Pricing Details Available
    Avg response time 12-24 hrs
  • featured
    Featured photo from Gallagher Way

    Gallagher Way

    3635 N Clark St, Chicago, IL 60613, USA
    • Spaces for 20-3,000 Guests
    • 6 Restaurants
    • 1 Hotel
    • 9 Total Spaces

    Gallagher Way is an entertainment destination, welcoming you to historic Wrigley Field. Yet, we're so much more than your Wrigley Field gameday experience. We’re a hub for people to eat, shop, play and stay. Come experience chef-driven restaurants, farmers markets, movie nights, yoga on the grass, music, ice-skating, winter market and more. Gallagher Way is a multi-venue district that offers beautiful open-air and indoor spaces for hosting any type of event. The 30,000 sq.ft. plaza and customizable green space is a great location for cocktail parties, networking events, weddings, concerts and other outdoor events. The amazing portfolio of chef-driven restaurants surrounding the plaza has all of the building blocks to plan the perfect multi-day event without having to leave the bustling district! An experience for all seasons and a diverse mix of people, all in one place. When you arrive at Gallagher Way, you’re at the heart of it all.

  • featured
    Featured photo from The Event Center at Wrigley Field

    The Event Center at Wrigley Field

    1101 W Waveland Ave, Chicago, IL 60613, USA
    • Spaces for 50-190 Guests
    • 1 Outdoor
    • 3 Event Spaces

    The Event Center at Wrigley Field, located next to historic Wrigley Field in Chicago, is the premier destination for business and social events. Featuring four versatile event space - the First Base Room, Second Base Room, Third Base Room, and Home Plate Room with an outdoor terrace- our venue offers breathtaking views of Wrigley Field, Gallagher Way, and the Chicago skyline. Perfect for corporate meetings, business conferences, client events, team-building activities, private parties, and social gatherings, The Event Center at Wrigley Field provides a seamless event experience. Guests enjoy a wide variety of catering options from Levy Restaurants and nearby on-site restaurants, along with high-tech amenities, state-of-the-art audio-visual equipment, and turnkey services. Whether you’re planning a corporate meeting, holiday party, networking event, wedding reception, or private celebration, The Event Center at Wrigley Field is your ideal Chicago event venue.

    Pricing Details Available
  • featured
    Featured photo from DraftKings Sportsbook at Wrigley Field

    DraftKings Sportsbook at Wrigley Field

    1012 W Addison St, Chicago, IL 60613, USA
    • Spaces for 50-2,000 Guests
    • 3 Restaurants
    • 3 Bars
    • 3 Total Spaces

    DRAFTKINGS SPORTS BAR AT WRIGLEY FIELD Adjacent to historic Wrigley Field, DraftKings Sports Bar is Chicago’s premier destination for sports, dining, and private events. Watch every play on a custom-built 2,000-square-foot HD LED display with state-of-the-art 4-Zone Directional Sound and over 300 seats offering perfect views from every angle. Perfect for group gatherings, bachelor parties, and corporate events, the venue offers flexible spaces, customizable food and beverage packages, and a lively, upscale atmosphere—just steps from the iconic Friendly Confines. DK DENS Located on the second floor, the DK Dens are perfect for happy hours, cocktail parties, business receptions, fantasy draft parties, and bachelor celebrations. Each semi-private den features dedicated audio and two TVs—allowing guests to catch up to eight games at once. With seating for 25 per den or 50 when combined, guests can enjoy a dedicated bar, flexible food stations, and an elevated setting overlooking the action. Features: Two TVs per den | View up to 8 games Seating for 25 per den | 50 when combined Dedicated bar | Flexible food stations SECOND FLOOR MEZZANINE BUYOUT With direct views of the massive 2,000-square-foot HD LED display, the Second Floor Mezzanine delivers the ultimate viewing and social experience. This dynamic space includes access to both DK Dens, stadium-style seating, and four spacious booths—perfect for mingling and hosting groups large or small. Features: Direct HD LED display view Access to DK Dens Seating for 100 | Standing for 175 Dedicated bar | Flexible food stations FULL VENUE BUYOUT For large-scale celebrations, corporate events, or private parties, a full venue buyout offers exclusive access to the entire DraftKings Sportsbook. Treat your guests to an unforgettable experience complete with 300+ seats, custom menus, and the energy of Wrigleyville’s most exciting destination. Features: Exclusive use of venue | Custom F&B packages 300+ seats | 2,000-sq-ft HD LED

    Pricing Details Available
  • featured
    Featured photo from Chez

    Chez

    247 E Ontario St, Chicago, IL 60611, USA
    • Spaces for 180-300 Guests
    • 1 Event Space

    Chez is a contemporary loft space that can be easily transformed for a variety of social, private, and corporate events. Original, white-painted brick walls and columns surround a contemporary glass staircase to provide a polished blank canvas ready for weddings, cocktail receptions, dinner parties, bar/bat mitzvah celebrations, not-for-profit fundraisers, awards ceremonies, fashion shows, product launches, networking events, holiday parties, and experiential marketing events. Furniture is now included for every event taking place at Chez. Our clear mirage ghost chairs and dining tables, highboy tables, and cabaret tables will provide you with a starting point on which to build your vision. Chez can accommodate 180 guests for a seated wedding reception, and 150 guests for a wedding ceremony and reception. Introducing Our NEW Cutting-Edge Features: Intelligent Lighting System: Elevate your special day with our sophisticated intelligent lighting system! This cutting-edge technology allows for dynamic and customizable lighting effects that can transform the ambiance of your celebration. From soft, romantic glows to vibrant, celebratory hues, our intelligent lighting adapts to every moment of your special day, creating an enchanting atmosphere. Perfect for highlighting key elements of your decor, enhancing the mood, and ensuring your wedding photos are picture-perfect, our intelligent lighting system adds a touch of magic and elegance, making your wedding an unforgettable event. State-of-the-Art Audio System: Enhance your wedding with our state-of-the-art audio system. Designed to deliver crystal-clear sound quality, our advanced audio system ensures that every speech, toast, and musical moment is heard with perfect clarity and richness. Whether it’s the emotional vows, the heartfelt speeches, or the lively dance music, our audio system provides impeccable sound throughout your event. Seamlessly integrated and professionally managed, this top-tier audio setup creates an immersive auditory experience, adding a layer of sophistication and excellence to your unforgettable wedding celebration. 40-Foot LED Wall: Our stunning 40-foot LED wall is the perfect centerpiece for high-end weddings at Chez Event Venue. This state-of-the-art feature provides a breathtaking backdrop that can be customized to match the unique theme and style of your special day. Whether you envision a romantic montage of your love story, dynamic visuals to entertain your guests, or elegant designs to enhance the ambiance, our LED wall delivers unparalleled visual impact. Transform your wedding into an unforgettable experience with the seamless integration of cutting-edge technology and sophisticated elegance, creating a truly memorable celebration for you and your guests. Located steps from Michigan Ave, Chez is situated in one of the most ideal locations for a Chicago event. Your guests will be delighted by the exclusive and convenient location. Chez is within walking distance of The Mag Mile, the Lakefront, Water Tower Place, cultural institutions, the Chicago River, for out-of-town guests looking to quickly explore the city. Five of the best caterers in Chicago make up the exclusive Chez catering partner list. You will work with one of our caterers to create a custom menu that will personalize your event at Chez. With 10 years of experience in the events industry, the Chez team will guide you through the event planning process and help you curate your event vision. Chez was once the home of the world famous Chez Paree nightclub, which hosted many of the world’s best entertainers, including Frank Sinatra, Louis Armstrong, Ella Fitzgerald, and Nat King Cole.

    Avg response time 2-4 hrs