From the NYSC website: "Our doors are open to help anyone impacted by Hurricane Sandy. All of our clubs are opening their doors to Hurricane Sandy victims allowing full use of our facilities. If you need to take a hot shower, charge your cell phone, or recharge your body with a stress-reducing workout, our club is your club. All we ask is that nonmembers bring a towel."
Not sure if other clubs in the city are offering this service, but either way, kudos to NYSC for opening their doors to those in need. Spread the word to your non-member friends without power.