I am by no means a prude..but this just sounds...icky! If I was given that information after the fact, I would decline because I would NOT want my kids in the house if this was going on (as others have said, unless they lock them in a room, one could wander out) and as someone who has seen male strippers (my friends idea for my bachorlorette party, and it was fun!) they don't just stand there and take their clothes off. Thankfully we were in the back, but I saw these guys dancing and simulating certain things on some women. Not an activity when grandma and great aunt Ruth are sitting there! Add in asking everyone to pay for something they may find distasteful for whatever reason (I wouldn't pay!) is presumptuous. So glad your son's schedule got changed, but they may still ask you for the money before you leave.