It is no more complicated than that.
Many years ago, when I drove cab in a mid-sized city in the upper midwest, one of my regular customers was an attractive black gal who lived in a seedy motel on one side of two and worked at two go-go bars closer to downtown. Sweet lady. She would ask for me personally if I was available. She explained these facts of life and how good the money was in her business.
On my final ride, I explained that I was quitting cab driving to go in the ministry. After paying the normal fare and tip, she leaned over, gave me a kiss (on the forehead), said "I'm proud of you" and slipped me an additional $20. That was a LOT of money for that town in 1979.
I never thought about clubs like that but it makes total sense.
Sorry for the typo.