When I went to Krubb, they told me they have show/orgy on Fri and Sat 8 pm.
Sauna Mania has no shows/orgies any more (info when I asked a few months ago).
I haven't been to R3 for a long time (>3 years) and don't know.
My favorite was the show/orgy in Sauna Mania. Favorite as in: I would instantly take one or two of their performers for 1000 each to my room. The atmosphere during the show/orgy (too dark, too wet, so many others around, excessive use of lubricant even for wanking) is not my style, but I could feast my eyes and hands on some spectacular bodies. Show/orgy in Krubb fewer models and fewer customers.