Men-only spas, steam rooms, hammams & Places to hang naked with men in Paris

Yeah, also following. Going to be on a solo trip to Paris in the spring and could do with some naked social time.
I went to the Cercle de La Forme gym at Batignolles branch.. Was hot. The gym is pretty basic but the men's changing room has a few showers with the doors broken so you have horny guys after their workouts showering with semis. And then the changing room as a men's only sauna and hamam so perfect for a bit of discrete fun
 
I went to the Cercle de La Forme gym at Batignolles branch.. Was hot. The gym is pretty basic but the men's changing room has a few showers with the doors broken so you have horny guys after their workouts showering with semis. And then the changing room as a men's only sauna and hamam so perfect for a bit of discrete fun
Do you need to be a member or can a tourist use on a once-off basis?