I very much enjoyed my time perusing around the bath house...
Entering the front door on Rue de St. Catherine.. you are in a small enclosed room with a window that you pay you the door man through. You are given a towel and a locker. Most of the men are parading around in just the towel - very few have other garments on - and the few that do, are harnesses, etc. There is the occasional fully naked man walking around advertising what he has to offer.
It was much larger inside than I anticipated. It was seemingly very clean. Throughout the many levels you had the opportunity to encounter all sorts of activities. Some activities you can expect are pup play in a locked glass room that onlookers enjoy, a wet sauna with very little light and lots of moaning and groaning. The dry sauna was well lit and had a few flat screen TVs with pornographic movies playing. While on the subject of pornographic flat screens - there were dozens of them all throughout the multiple levels. There is a roof deck that guests can smoke on (or do other outdoor activities). You can find showers on pretty much every level, all community-style of course..
There were definitely a wide variety of guests in attendance, ranging from those looking for casual conversation to those that would like to be made into a human toilet. There are vending machines stocked full with energy drinks, etc. There are also prophylactic dispensers located all over.
So.. if you're looking for a place to venture to and soak in the suds of a hot tub with several other naked men at 3, 4, 5, 6AM.. etc. this is the place to go. The main entree fee gets you a locker, but for an additional fee you can rent a room that you can either close for privacy or leave open for unexpected/expected(?) guests..