One Hundred Club

One Hundred Club is a private club and event space on the top floor of a downtown Portsmouth building, known for its views of the Piscataqua River and the historic roofline of downtown. It hosts business meetings, retreats, corporate events, rehearsal dinners and private parties, with a banquet menu for groups from about 10 to 125 people, depending on the set-up.

The club has three meeting rooms with more than 2,400 square feet of space, a 50-seat member dining room with an 18-seat bar, and a rooftop terrace. On-site meeting planners help arrange events, and the kitchen can accommodate guests with dietary needs such as celiac disease or veganism. The club is at 100 Market Street, a short walk from downtown hotels, parks and restaurants.