Gym devotees who call One Manhattan Square home have more than enough in-building fitness offerings to keep them in shape for a lifetime. Among the 100,000 square feet of amenities attached to the Lower Manhattan apartments for sale is a multilevel fitness center that boasts a full-size basketball court, squash court, two-lane bowling alley, golf simulator, weight room, cardio room, 75-foot indoor saltwater pool, children’s wading pool, hot tub, sauna, hamam, and cold plunge pool, locker rooms, and multipurpose fitness studios with stunning East River views.