The answer that nobody is going to say and what is actually going to happen is this:
Your brother will mention that the invitation list is getting made to his fiance
If she really doesn't want you going to strip clubs, she won't say "don't go to strip clubs," but she'll say "make sure my brothers get invited."
Your brother won't be able to say not to the bride for a wedding related thing, then he will tell you to invite them. I am guessing this will happen within a few days.
If it doesn't happen, then it means she doesn't really care. If that is the case, as long as the brothers are cool, it doesn't matter if they go. It's really up to your brother at that point, though.