I hate to be a party pooper, because I don't feel that supervised teen drinking with family is a big deal, hell most of Europe does it all the time, but, here locally, if a teenager has a party, in a parent's home, and serves alcohol, and the teens attending the party get in trouble somehow, either DUI or something similar, the PARENTS are the ones who get in trouble. So just a warning to ya, check your local laws, they might be similar to here.