My FH and I aren't planning on purchasing alcohol to serve at our wedding reception, both because neither of us drink at all and because we want to save money. I know it's pretty traditional to have champagne at weddings, and since we both don't drink because of personal reasons instead of religious ones, we don't really care if other people drink - and I know that there are going to be a lot of people in both of our families who are going to want to. Would it be considered tacky to allow a sort of BYOB wedding, or should we just set a 'no alcohol' rule for the reception?