Gyms
https://www.google.com/maps/d/u/0/viewer?mid=1zKg0WsxPKj5M1BBf2llU4cKCwWoEsU4&ll=40.715494953328374,-73.9714327&z=12
Link to custom map
Lower Manhattan: Lower Body (1-3)
Brooklyn: Back, Shoulders (4-9)
Upper Manhattan: Arms, Chest, Abs (10-19)