Background: FH's groomsman cc'd me on the email he sent out to all the guys announcing the plan for his bachelor party. I have no need to know the details of his bachelor party, but the groomsman's decision to include me makes some sense. Since FH lives out of state now, the guys decided to plan his bachelor party around the day we had already set aside for him to fly in so we could get together with friends to brew beer for our wedding. (Several friends who are brewers are giving us that as a wedding gift. They offered to do the brewing with us at one of their houses, and suggested that maybe FH and I could provide lunch during the process.) So the day will now have guy stuff in the morning, then the previously planned co-ed get-together while we brew beer and I feed people lunch, then more guy stuff in the evening. The groomsman planning the bachelor party is not one of the brewers, but he invited the guys to the entire day's worth of events. I think the groomsman included me so I would know when they'd be back after the morning stuff and would be ready for brewing/lunch with the larger group.
Problem: In trying to determine how much lunch to make, I was looking at the to-line for the email for the bachelor party, and I noticed the groomsman included several guys who are not invited to our wedding. After asking FH, it appears the groomsman guessed at who all to invite without checking with him. I'm normally a pretty easy-going person, but I'm pretty grumpy about this. Our wedding invitations have already gone out, our hall is at capacity, so we can't fit six more people (it's a space issue, not a money issue). Even if it were possible to include these guys and their SOs after the fact (which would be rude in itself I think, because it's B-listing), both sets of parents would be pissed that they were invited instead of family/family friends we had to cut from the guest list early on.
Now what?: Were this just his bachelor party, I would be telling myself not to care, because it's not my party, so I'm not the one being rude by inviting people not invited to the wedding. Under normal circumstances, I wouldn't expect to give input on who got invited to FH's bachelor party. But the middle of the day is not his bachelor party, it's people actively helping us brew beer for our wedding. Granted, most of the people who aren't experienced brewers will likely just hang out and eat/drink, but I would never have invited someone to that who wouldn't get a chance to drink the result and celebrate at our wedding. I don't know if there's anything we can do about it, though. I'm not even sure it's worth informing the groomsman of his mistake, since he can't uninvite people. Is there a solution I'm not seeing? If not, what do we say to these people if they show up to brewing and ask where their invitation is?
Sorry this is terribly long and convoluted. I am not a succint explainer when I'm grumpy.