When you just don't have time to get to the pistes at Whistler, Aspen or even Naeba, try Slope Infinity. Learn to ski on revolving carpets similar to treadmills that can be manipulated to move at different speeds. The large ski deck that can accommodate three people at a time. Just think: no queuing for ski-lifts or worries about wiping out. Helmets, elbow and kneepads provided, while a harness keeps you on your feet. Instructors available for lessons.