It sounds like you're going to a Caucasian shop.
Generally the girl will come to the waiting room, introduce herself and then ask you what you're looking for. You can say whatever you like and then she'll respond with whether or not she does it and then how much.
I'd just bring another $150 if you're interested in having the experience you're after. To be fair, you could probably go to an Asian shop to get the experience you're after without worrying about extras.