Im guilty of this conversation piece (that and political science). My coworkers are mostly overweight, eat poorly, and most of them smoke, so when I mention what I do before and between work in the daytime and school in the evening, and what I do on my weekends, they look at me like I haven't 'lived' b/c I don't get trashed on weekends or smoke or eat the birthday cake (ok a little ice cream every once in a long while just to satisfy the taste buds!). This also applies to many of my pre-bike friends, and my fam, particular my sis. B/c I'm in school and work, cycling is practically the only thing extracurricular for me, so the conversation is either about poli sci or cycling (never work!)