They invite you to empty your valet with the help of a great many drinks which you will take in a bar they work for. It's their main business to make you pay for drinks because they get a profit.

Of course you can pay abt.THB500 to the Pub and ask the girl to your room in the hotel. But can you do anything with a Thai girl after a lot of drinks languid with the tropical heat? Sorry, I can't.