The San Francisco Tennis Club is one of the only indoor facilities in the city and certainly one of the largest. They also have courts on the roof, which are great if it's not too windy. All the courts were recently resurfaced. It's nice to be able to play whenever you want to rather than having to wait for public courts. The club has full fitness facilities as well, not to mention a restaurant and tennis pro shop. Tennis is the focus of the club, though, and there is plenty of it.