Just to be clear, when you say “party favors,” it specifically means coke, not any of the other stuff. You might be alluding to herb etc, but just know that everyone else will think coke.
I’ve partied and smoked and drank and have done basically everything with providers, but this was during outcall.
I don’t think the girls are even allowed to partake in an AMP.
Furthermore, why would you even want that? I’ve shown up to a few AMPs while puffing on a joint and they either ask you to put it out or just say nothing as you smoke it, never has a girl asked for a hit. You envision yourself doing lines in an AMP room as part of the experience? Why? Just do what you like beforehand or just quickly maybe after the table shower when you get back in the room. I can easily see a girl or the actually establishment taking offense to you trying to be a ski instructor as part of your session.