British Swim School at 24 Hour Fitness - Tanasbourne Super Sport is a swim school operating inside a 24 Hour Fitness gym at 1265 NW Waterhouse Ave, Beaverton. It offers year-round lessons in an indoor, heated 25-yard lap pool, with programs for children, teens and adults including Adult Levels 1 through 3. Lessons are 30 minutes each, and private lessons are listed for adult programs.