My experience of Night Clubs in Beijing is that they are separated by 2 extremes. One is those exotic ones whereby girls would strip to their last piece and play lots of "games", like putting cherry tomatos into her secret area. If you are into wild stuff, these are great.
The second type is those HK people go most often. Very grand and the girls can be very pretty. But as many brothers quite rightly pointed out, these girls sometimes can be too decent and not "touchable". These girls are often gold fishes. If you want something more you need to either please these girls and I have had free night with one very pretty one before or (ii) you be straight forward and ask Mama to only bring you those who would go all the way.
Passion is extremely expensive so I would not recommend going. There are others like 富华 which is a lot more reasonable in price and the girls are also very good. Tip - go in a weekday and go before 9pm.