This is just anecdotal but I had a girlfriend once who went to see some strippers. She told me they were ugly strippers, with chubby bodies and small, ugly penises.
Of course she did go to one of the smaller/seedier strip club things so maybe if your fiance goes upmarket the quality of stripper will improve. Even so you shouldn't worry about it.
I'm sure she isn't happy about you seeing a female stripper either. BTW do people still do that? I thought seeing a stripper before your wedding had lost popularity? But then I don't know much about weddings.
Also, your wife sees someone better looking, taller, sexier, richer, etc than you every day. You just have to accept it and trust that she will come home to you. You're only allowed to worry if she doesn't come home at night.