Anyone Side?

I saw on youtube videos in which a Sauna in Thailand allows the visitors to choose the provided colourful Led lights to signal to others their preference (the four colours are for top, bot, vers, and side, if I remember correctly). Thus, sometimes I went to a gay sauna and I really did not know how to “behave” as I was only interested in dicks: sucking, frotting, licking, throating, everything about dicks, but I was not interested at all in asses or anything related to them like fucking, fingering, etc.

If Number 52 Sauna has something that helps visitors to signal their preferences like colours, it would be exceptional, helping the visitors themselves to have some “preliminary scan” of the environment.