Years ago there was a weekly men only clothing optional night at Euphora spa in Queens. It was a lot of fun and quite busy. It was a regular spa with all kinds of services on the first floor. Men only night was in the basement. It had open showers, sauna, steam, pool. Very nice, clean space. They also had a bar and a lounge. The spa is permanently closed now like many others. They still have a listing on Yelp if anyone wants to check out the pictures. Would be cool if someone could recreate this at some other similar spa. This could be quite profitable.