Most interesting and crowded part of sauna was 'no towel area' with some disco strobe lights and smoke where guys were touching, sucking, enjoying a lot of naked bodies
- dont know how that area looks other days when they dont have 'Naked friday' party.
I didn't see a lot of guys going to the cabins so mostly some touching, sucking in 'no towel area' and steam room.
I would give 7.5/10 for Naked friday in Kaiserbrundl (you dont have to be naked everywhere, just in mentioned no towel area - you dont need to enter there if you dont want to), there were like 50-100 people from 8-11pm mostly 35-50, a lot of hot ones.
I also visited Therme Wien on Saturday....it was ok but not so crowded, in male only area in sauna there were mostly 50+ guys. Weather was perfect outside so maybe people didnt want to spend a day in therms.