I like workin' out if it's a sweet gym with topnotch gear and women and a great snack bar. But if that's not happening, believe me, you can work out virtually anytime, all day. Here's some underrated calorie burners you can do just about anywhere, even on the way to Vegas at 2am:
Fidgeting.
Twitching.
Smoking if you put your smokes in a tough pocket to reach.
Singing along to killer tunes.
Hustling women at a bar (lots of standing, very demanding on lungs)
Shouting and carrying on at a craps table.
Air guitar (burns as much as actually playing)
Walking to the next casino instead of cabbin' it.

You combine these activities with just picking some food off a friend's plate, you're hundreds of calories ahead. Gotta blow, my Blackberry's ringin'.