The One Hundred Club

The One Hundred Club is a private event venue occupying the top floor of 100 Market Street in downtown Portsmouth, New Hampshire. The club features a wrap-around rooftop terrace with views of the Piscataqua River and the surrounding historic cityscape, a 50-seat member dining room, an 18-seat bar, and three exclusive meeting rooms spanning more than 2,400 square feet — accommodating groups from 10 to 125 guests depending on configuration. Located one hour north of Boston and 45 minutes south of Portland, Maine, and accessible via Interstate 95, the venue sits steps from downtown hotels, parks, and entertainment. The club hosts private celebrations, rehearsal dinners, corporate meetings, and executive retreats, supported by professional on-site meeting planners and in-house catering.