90 min? Have the programme in mind while taking those pretty sideliners. One round seems to be the norm mainly during the first sessions. However, by the time you become one of their regular customers you will have no problems to get two rounds and BBBJs after saving some time from the damn long standard bathtub session.
Ah! you can try to bang them (sideliners/b-course regulars) right there inside the bathtub. You will make the hell of a mess splashing water all over the surrounding area of the bathtub, but who cares? Just do it!! Have fun!