I visited sauna Babylonia on a Tuesday evening, early November. I stayed in the sauna from 8 until 10 pm. After entering, a cute looking, bearded guy opened a window telling me that I had to pay 300 Kc. I received a single towel. Later, I figured out that you can get a second towel for 10 Kc.
The changing room is a quite open space. Finding the showers needs some navigation, as you have to pass the bar area. From then on, it is pretty straightforward.
The whole area is actually pretty nice. It still looks fresh with sufficient light in the shower and Finnish sauna areas. The sauna itself is not very large, but large enough to accommodate five or so. At the time i Visited, there were 15 or so other guys aged somewhere between mid thirties and early forties, with one older bloke and one pre-thirty.
After heating up in the Finnish sauna, I relaxed on one of the lounge chairs. It's a great place to watch naked bodies. There was not a lot of talking, though.
Adjacent to the relax area is one of the two steam rooms. I was a bit disappointed about this one: It was dark and the benches were just to cold to sit down. This team room is actually like a small maze, which you can exit on the other side. Opposite of this steam room is the entrance of a second steam room. This one is even darker (man, why so dark?), and much hotter. Here, the benches are too hot to sit down. But sitting down is apparently not the reason to enter the room. Hardly in there, a good looking guy entered and immediately went into action. Man, that was good!
After relaxing a bit in the bar (prices are reasonable: a beer costs 50 Kc), I went into the cellar were you find cabins. Lots of action there and no problems to find a nice bloke to share a cabin with.
After a last time in the Finnish sauna and some cooling down, I decided to leave. I had a great time! I would definitely come back when I'm in Prague again.
Good: nice atmosphere, friendly staff, modern and clean.
Less good: Steam rooms are very dark. I do not understand why there are two rooms. Instead, a whirl pool would be better.