In my personal experience, most women aren't into watching a couple guys going at it. I've done a few live shows in clubs and the interest is there with another girl, or solo, but not so much two guys going at it. Exceptions of course but few and far between
I have put on a bi sex show for quite a few ladies at different times with my friends... they could just watch us, or join in as much as they wanted. Without fail, not one of them could keep their clothes on! And all but one ended up joining in, and being fucked by both of us guys!