To some guys, talking to a pretty girl is a real thrill, and they will push it as far as they can. To a certain extent, providers and strippers are a fantasy of what men want about women, and they are fascinating for a lonely guy to talk to and interact with. Just gently lead them in the direction they really want to go. If they have no money, ignore them.
All businesses have tire kickers. When people meet me in social situations they are always trying for free advice. Some people like the role of customers and getting served. I'm sure in this line of work, a girl meets all sorts of losers and wierdos, some can handle them better than others.