As a person who's perfectly happy to drink during social occasions, I'd've suggested the problem is not that the girl drinks, but that she's an entirely selfish b****. What kind of friend tells someone with an impacted tooth "How dare you have that medical concern seen to in a timely manner! I need a babysitter while I party!"? It's not as if she planned to have dental surgery just to inconvenience her partying pal, but you'd think so to hear her so-called friend's reaction.