Hello! I apologize for the delay as I was still at work. She's more than welcome to be a courtesan (I believe that's the proper terminology within the mod journal)! The Nevermore brothel isn't advertised. It is only for the elite, higher ranked society and is invite only by either Marcus or the madam that he'll likely have who runs the day-to-day operations on the brothel side of things.
On the more public side is the speakeasy, bottle service bar. Meaning, each booth has a host or hostess that gets rented for their services of entertainment, ordering, serving drinks but in a more Japanese shake house/ geisha service style. Personable and subdued.
If you'd like a custom to go over more details, I'd be happy to provide!