As already stated it is against the law for the ladies to discuss prices except in their rooms. They are independent contractors and set their own prices. You would need to come out and talk to them. It’s going to depend on a some factors, one of the most important how you treat them when you meet them. They are wonderful ladies and deserve to be treated with lots of respect and kindness. I would suggest you bring plenty in your case. You can look here for a starting point, but the ladies set their own prices and who they want to party with. Good luck.