I've seen my share of holiday office parties and happy hours, where everybody has had a few cocktails, and suddenly the entire department is hugging and singing 'Sweet Caroline.' For those few hours everybody thinks they're friends with everybody else, and the normal facade of professionalism drops. And people are more honest than usual. Perhaps more honest than they should be. ("I never liked Glen from technology, but I really like you, Felicia. I really, really do.") And then the next day everybody goes back to being their buttoned-up selves.