Yes, only a short 100 miles away from NYC, is the MASSIVE 8th Annual Philly Naked Bike Ride (PNBR) scheduled for Saturday 9/10/2016 starting at 5 PM from a location yet to be disclosed. The public event is free.
You can also check out the PNBR facebook page, and facebook event for more frequent detailed updates.
WARNING: Video shows some naked people of both genders riding bicycles!