Formerly the Ridgefield Athletic Club , Ridgefield Tennis Club (RTC) boasts the largest domed tennis facility in Connecticut with eight indoor Hartru courts, five tennis pros on hand, state-of-the-art lighting and a temperature-controlled environment to offer the best in player satisfaction. Youth and adult programs, and lessons are available. Locker rooms, an outdoor pool (seasonal), and a full-service babysitting facility are also found on the premises.