I was a little surprised - I didn't think people would be bothered with it being girl on girl.
Yeah, some people think girl on girl doesn't 'count' or something. I don't get it, but that's none of my b. To me the scene would have been no worse or better had Gina been trans or a dude or twelve mechanics from Brisbane in town for a carburator convention.
I did expect the 'Novagina' gag to be set-up for her having a dick though.
I did think that it could have been signposted a bit more that just entering the club would lead automatically to the MC enthusiastically handing his sub over to someone else to play with, but I believe others have pointed this out already.
Why a man with a literal harem in his basement and buildings full of women would want to go to some sketchy sex club at all is a bit beyond me, but then I never saw the appeal of those anyway.