Rock Stars with Day Jobs

There's a temp at our office who, by night, is the singer in a local rock band. I've actually heard of them before, and heard that they're pretty good, so it's not just some random bunch that plays house parties now and again. Anyway, on the first day, he was really friendly, wearing a dark blue shirt and shiny tie. Ever since then, he's shown up in some Wicker Park version of Western wear, and he never even nods in recognition at his fellow proles anymore. I thought maybe he'd decided to go all rock-star-ego-tripping on us, but according to my comrades whose desks are closer to him, he's just got a massive hangover every day. That's the perils of living the life, I guess.