To answer the questions of the topic;
If you're in a closed relationship, you shouldn't really go to strip clubs unless they're the style of not going nude, as winterborn said.

But if you're in an open relationship like me, then by all means, go to a full nude strip club.

I also somewhat agree with Necron. Your friend should apologize, but.. I don't think he should go to the wedding. It's obvious he'd be better off if he didn't go. He'd just ruin it.