I could swear I've seen this on here before, but I want to double check. Everyone in a relationship is invited with their SO. But we do have some truly single friends and we didn't give plus ones to single guests (except wedding party, although none of them are bringing dates anyway). If we get more "no" responses than we expected, is it okay to tell single guests they can bring a date if they choose? Or is this still B-listing? Also, what if we can't offer this to all single guests, but only to some? Would that be wrong, or is there some hierarchy (i.e., older guests should have first dibs or something--I don't know) I should follow?