Want wintry exercise that doesn't require a schlep to Vermont? Then grab a softball, some form of club, and find the nearest patch of ice to replicate a game of "colf." A popular colonial Dutch pastime, colf combines hockey and golf: Just choose a target down-ice and see who can hit it with the ball in the fewest number of strokes. And urbanites need not fear--if no tree stumps are nearby, simply aim at a hydrant or some passed out wino.