Special massages on the raise?

Omg. I don't know where else to post this but I may have gone to a special massage place and not known it until I came home and thought about the experience.

It's a 4 hour sauna with massage place. So you can get a sauna and shower in segregated locker rooms and once you're ready for a massage you can go out into the "relaxation lounge" in the back that has recliners and alcohol while you wait for your appointment and they take you into one of maybe 30 rooms. It's like a maze back there. So many rooms! So many corridors! You could easily get trafficked.

So a few things that make me question it are as follows:

1) they ask for a tip in the beginning while you're paying for the services, usually tips are accepted at the end so I found that odd.

2) I saw a few men there and so many female workers but only saw one other female customer.

3) exiting the sauna/locker room, you go through two doors. One exclusively is a door from the sauna/locker room to a kinda small room basically the size of a closet with a second door that leads to the "relaxation lounge". In the woman's side both doors were closed and you had to open one after the other so no one can accidentally see into the locker room. However in the males side, both doors were wide open and you could literally see into the men's sauna/locker room.

4) while getting a massage, this is unlike any massage I've gotten. The woman giving me the massage literally got on the table and put her entire weight on me. There was one time where she put her legs on the side of my head with her knees on the massage bed.

5) the room was chilly. Not like uncomfortably chilly but more than a normal massage place.

6) the room was also lit up and they gave you a towel to cover your head so it doesn't look too bright.

7) idk if this is standard or normal at all, but she spent alot of time massaging my ass and there was a point where her hands almost too close.

Anyway, do you guys think this is one of those special massage places? In my opinion, the reason they make you tip in the beginning is to kinda signal to them which "service" you'd like.