They used to be common around here in the Seattle area. Most of them were brothels with an occasional real girl in a bikini serving you out of a coffee shack in a parking lot. Is this not common?
https://taphaps.com/hillbilly-hotties-bikini-baristas-263/
https://abcnews4.com/news/crime-news/bikini-barista-stand-owner-accused-of-running-prostitution-ring