@ck1993,
Isn't this something that can be solved with a conversation?Different couples have different feelings about strip clubs, you need to communicate.
I understand how you are feeling, and I think your feelings are legitimate. On the other hand, a lap dance isn't sex and this isn't really something you need to worry about. I think you should express your feelings and make it clear that this isn't something you are happy about. Then, as you say, you should let it go.
I would be pissed off with the friend who put you and your husband in a very difficult situation.