I've travelled Europe for 2 years and visited many gay Saunas and spas. Sometimes negative reviews occur because the reviewer didn't get sex, or felt like they were 'not in the right place' and feeling rejected, subsequently dislike a venue.
Let me be clear. I was certainly not rejected at this venue. I was possibly the youngest (I'm 30), and slimmest person in the entire place. I was constantly followed around by people and in one instance had to tell a man to stop trying to touch me (Nein Danke didn't seem to work).
Even so, older patrons do not necessarily cause a venue to be rated badly. The bathhouses in budapest are filled with dirty old men, but they are beautiful and clean and worth the money.
Kaiserbrundl was dark, miserable, and actually dirty. There was dirt and grime and mould on the walls and steps and floor. The pool was much smaller than it appears in the photos and the water was brown/green and cold. The showers were terrible (run for 4 seconds and then require you to push the button again and again and again) and the steamrooms were mouldy and gross. The bar was filled with cigarette smoke.
The saddest part about all of this is that the sauna has such potential if it were taken care of and cleaned. It could be beautiful (like I imagine it once was). This sad depreciation of beauty (a longing of what once was and no longer can be) sadly parallels the clients that visit the venue.
If it only cost me 5 euros, I'd still be disappointed. But it cost 20 euros and was abysmal.
To be clear, you will leave this place feeling dirty and unfortunate and wishing you'd spent however long you were inside, outside.