12th Street Gym. After doing laps in the 25-meter indoor pool at the 12th Street Gym, you can relax on a poolside lounge chair. The staffers pride themselves on keeping the pool spotless. Day passes are $20. 204 S. 12th St., Center City, Philadelphia, PA, 19107. PHONE: 215/985-4092. www.12streetgym.com.
Philadelphia Sports Club. From Memorial Day weekend through September, Philadelphia Sports Club opens a large outdoor pool for swimming laps or just cooling off. An extensive sundeck furnished with lounge chairs surrounds the L-shaped pool. Lifeguards are usually on duty. Day passes are $15 if you're with a member, $30 without a member. 220-250 S. 5th St., Society Hill, Philadelphia, PA, 19106. PHONE: 215/592-8900. www.mysportsclubs.com.