There is no good or bad time, every day is hit and miss. Sometimes there’s a lot of people you’re interested in and sometimes there isn’t. That’s the nature of the sauna. The older guys are honestly a big problem, many struggle to understand that if you don’t show ANY interest it might suggest that you’re not interested – best thing to do is just ignore them. That said, I’m 21 myself so if you were interested in going together/meeting there just let me know – I have contact details on my profile.
As far as I know the only places you can’t do anything are the locker room, cafe/bar, hot tub, and lounge. Everywhere else should be fine.