The Lisboa Hotel is a very convivial place to stay but a gentlemen often has to run a gauntlet of charming prostitutes before he can blow his cash in the large casino there.

The girls must turn back & start a new circuit when they reach the main entrance, if they haven't been retained by a punter, or the hotel staff will eject them from the premises.
Each girl pays a levy to the staff, im not sure how its paid though.