This place is great in the winter, especially because they have certain hours when the price is…read morelower. The problem is that during those hours it is impossible to do a work-out swim. Forget lap swimming, there are no lane lines and swimmers pretty much have to stop at each side of the pool to plan how to criss cross their way to the other side.
And the late night cheap swim seems to also be the make-out-in-the-pool spot and the get-sexual-favors-in-the-corner-of-the-pool times. I haven't gone during the normal hours but if you are here as a tourist and want to see the beautiful architecture, go during the day. It is certainly worth seeing.
The sauna is also affordable and charming with the old tiles, but I went on a mixed (male and female) day that was a total sausage party. Honestly, I don't care that the majority were dudes, but why they all seemed to be doing yoga moves that required spreading their legs as far as possible in the air has always baffled me. Not too pleasant when the sauna is so packed that the guy behind you is dripping on your back!
For a more pleasant mixed sauna, I recommend liquidrom or this one really cool, smaller Russian owned sauna in Friedrichschain (will review soon!).