So I was talking with my FI's best man about his bachelor party next month, and it sounded like a fun time. Laser tag, go-karts, football and then a big barbecue. Then he continued, saying there would be a 50/50 raffle and some other stuff like that at the barbecue, that it would be a "stag party," that people who aren't being invited to the wedding would be invited to this barbecue, where they have to contribute for food and give money to FI. Etiquette hell, basically.
He can't event use the excuse that everyone does stag and doe parties here, because no one I know has ever had one. They are unheard of here. I'd never heard of them until joining wedding boards, so I have no idea how he even got the idea. People are going to come to this barbecue and think it's a money grab.
I told him all the reasons that would be considered rude, and he refuses to listen to me. FI has no idea any of this is going on because the whole day is a surprise for him. How do I handle this? I don't want to ruin FI's bachelor party, but I don't want to piss off a lot of people FI cares about either.