Hi,
Based on my limited experience at jail-ory,
it has a similar system like "hostess club".
You pay your entrance fee and then choose a company or mate,
whatever it is.
Then you order some drink for yourselves and your hostess/mate.
You are paying the tips to the mate in this way, I guess.
Mio-chan, our mate during our visit, ordered some whisky
and it is not as expensive as hostess club for sure.
Then are can talk with your mate and ask her to give you are a demo
or illustration behind a curtain if you want.
But not that "personal", I guess.
They usually have one or two stage show for every one.
What did we watch is a candle game on that night and not BDSM in the western sense.
They also invite couples to the stage after or before the show to have some illustration.
I spanked my ex-partner's ass in front of others
Regarding to the group of customers, I think it is quite diverse.
Besides us, there were a group of co-workers mixed with guys and ladies.
Also some single man there talking to their mate/hostess.
In general, it is quite friendly place.
I would suggest you to be relaxed and give a try.
By the way, if you want, I could join you.
Hope this will help a little bit.
yours