What does working in a sauna entail? Curious
there will be several ladies working. A receptionist will be taking bookings and dealing with clients. When clients arrive you may be required to line up and greet him so he can choose which lady he wants. They will require photographs, some may do this free and they will retain the images. Some may charge you for doing this. Some may ask you to provide your current images.
Some places will have an all inclusive fee, so it's basically shit money. Some places will have a basic house fee and you charge extras in the room. Each place will have its own rules.
Be prepared to pay reception fees on top of what they take per client. Most if not all will also require tips to be paid to receptionist/runner/cleaner. Think of this as a bribe, don't tip and you may just find yourself not being up forward as nicely to clients as other ladies who tip.
You are not employed by them so you will be responsible for your own taxes. But they may have rules like you have to work exclusively for them, check.
If the place is ever raided, you are not legally in any trouble for working there, that falls on the receptionist and the owne, but you will have all your cash confiscated.