Let her be in control and go with the flow, don’t be aggressive. Lay down on your stomach so she can start the massage. She’ll massage and get a sense of how passive or aggressive you are and she’ll either warm up or cool off to you based on how she feels about you. It’ll change soon enough and she’ll start the tease and ask what you want and how much you’ll pay. If you go to bodyrubs, you’ll either have already paid up to a BS option at the door or some spas have the rates posted in the room like a menu and you make you selection. Anything above that is negotiated between you and the girl.
Unless you go to an all business spa where you go in, get off, and then leave, the girls will respond better to guys that act like gentlemen rather than jerks.