During the summer, seniors can do water aerobics three times a week at the Dapolito Recreation Center’s outdoor pool, at Clarkson St. and Seventh Ave. South. Senior swim is on Mondays, Wednesdays and Fridays, from about 10:10 a.m. to 10:40 a.m. Adding some artistic flavor is the recently restored Keith Haring mural that lines a wall on one side of the pool.