I assume this falls under the category of "you do you", but I wanted to make sure.
We aren't doing a sweetheart table because our venue doesn't really have the room for it, and FH doesn't like the idea. Fine.
We have no real bridal party, other than our best man and MOH (who is my sister). If we sat with my sister and her boyfriend, plus our best man, and two other friends (my partner's writing collaborator and his wife), there's nothing wrong with that, right? I would put my brother and his date with my mom and stepfather, and I'd put my father with his mother, and friends who they would get along with.