Club(s) in Graz?

Hello, I will be in Graz in the week of 23 May. I go to swingers' clubs with my girlfriend, but I will be in Graz alone. I know that not all clubs allow single men - and if they do, sometimes the balance between single men and couples is not quite right. Do you have any tips where a single man in Graz would have a good time? I am 43, bi-curious (a little experience), and up until now no experience on my own in clubs. I was looking at Club Fantasy so would especially like info on that one