@JackBond Correct. "Private" means you will not enter into the public space of the club and all the ladies who are not busy called up for your selection and then...
The pricing "private" vs. regular clubbing is rather opaque though:
15' is unique, not available in the club (but who the fxxx would want that?!)
30' is saving CHF 6, 45' is loosing CHF 14 and then it deteriorates further...
In the club you are free to use rooms as well, free use of sauna/steam bath, porn cinema, soft drinks ... and, indeed, you may fxxx wherever your dxxx may direct you (that's what I usually do, subject to the beauty's consent, of course

).