It's been well noted on here that you pay the receptionist for the room fee, then you tip your girl for the extra services she provides. Usually the going tip rate for fs is 100, and bj is 50. I would recommend Daniella, Katie, and Kelly. Some will also recommend others girls as well, if these 3 most popular girls are not available, because sometimes they're already booked up one or two weeks ahead of time.
If you're planning on visiting on Friday, you're best bet is to look at the schedule on their website, decide on which girl may tickle your fancy, and book a session with her today, to avoid disappointment.