What a lot of people don’t know today is that there was a difference between whores and “saloon girls”, at least in towns like Dodge and Abilene. Saloons were located in the main part of town, and the girls who worked there acted as hostesses. They talked to cowboys who had just got paid and got them to stay and drink and buy them (usually fake) drinks. There was no “upstairs”. The whore houses were located away from the “decent” part of town, on the “wrong side of the tracks”, literally. Railroad workers stopping over would hang their red lanterns outside so they could be found if needed, and that’s where “red light district” comes from. It’s Hollywood, especially movies made since the 1970s that conflated to two; in reality Miss Kitty’s girls wouldn’t have been whores.
It has been a long time since I was in Las Vegas, but the old time saloon girls might be akin to the cute gals passing out the free drinks at the tables? (Do they even do the free drinks anymore for the regular “cheap” tables?).