H Street Country Club, D.C.

Most mini golf courses pride themselves on their family-friendly offerings. At H Street Country Club in Washington, D.C., however, you must be 21 or older to play. That makes it a good place for a unique date night or a twist on happy hour. The indoor course is part of a destination that includes a Mexican restaurant, a rooftop deck, shuffleboard, skee-ball, and video games.