I'm surprised to see this thread, since I recall a thread from several months ago claiming it's gauche to roll up sleeves. Me? I've been rolling up my sleeves for the past 25 years anytime I don't wear a jacket. I usually use the triple-roll as Kent Wang does, but sometimes a double roll. My habit stems from my college days when I was pressed for time and threw everything into the dryer on "high", but I couldn't afford decent clothes or new clothes when my sleeves shrank enough to fit a mini-me. So I rolled up my sleeves to disguise the fact that they were too short. Now, even though my sleeves fit, it just doesn't feel right not to roll up my sleeves. Just call me gauche.