Atmosphere in SexKinos

I have a question: can someone who has been there tell me about the Sex Kinos in Frankfurt and in Munich? Do real women visit them? Are there any spontaneous gang bangs, as one sees in the videos on the Internet? If one goes to a glory hole, how likely is it to find a female on the other side? I am asking because from what little I found in various Forums (not here), it seems that these Kinos are mainly for TS and the gay crowd. What was your experience? I see Sex Supermarket, Josefine, Woxxx, and Jerome in Frankfurt, and some more in Munich. If any of them are worth visiting for a heterosexual male, which ones would you recommend? Thank you in advance!