Padum pum! Sorry about the pun but it made me laugh when I thought of it so hopefully you will at least smirk.
Tough situations are rarely remembered for their levity. I had a co-worker who shared an experience with me a few years ago. He and some of his buddies were at a strip club and were surprised to find their friend's wife dancing. It was an awkward moment to say the least. Much more awkward than the things I've been through lately for sure.
The stripper's husband knew about the dancing but was unaware that his friends were witness to it. The lady recognized them immediately and treated them no different afterward but it made things difficult between the group of friends.
I've never been to one for many reasons, this being a possibility. With as large a family as I have, I am bound to run into someone. Add to that the fact that I wouldn't want to sit down anywhere near the place and I am truly, happily married and those should be reasons enough.
I thought to myself, what would be the worst possible scenario while not quite crossing prostitution boundary...
I excluded grandparents because I thought, while funny, it wouldn't really add to the realism and introspection of the poll.