Why? If she didn't want to serve food at all at a 4 hour reception or invite 100 people for 50 tables and have people eat in shifts, that would negatively impact the reception. Having a vegan menu is not so far out of left field that he needs to put his foot down for the sake of the guests.Yes if she's paying for her own wedding. If Dad is hosting the party and paying then he has a say.

). Allergies to certain foods means all the food served would be free of those ingredients so they could enjoy everything instead of being limited in their choices like they are every other day of the year. If they held religious beliefs that didn't allow for dancing, that would get scrapped as well. I wouldn't tell them that they could just stay seated on their wedding day because, dammit, I want a dance floor. I'd want the guest/s of honor to be able to fully enjoy every aspect of the party being thrown to celebrate them, and I consider the aforementioned examples to be valid reasons to make accommodations.