As folks across the country watched the U.S. men's team win a gold medal in curling, their thoughts were the same: "This is amazing! But what the hell's going on? And why do those guys have brooms?" The answers to these questions and plenty more can be found at the Denver Curling Club, one of the few rinks dedicated to curling in the West; the next closest centers are in Bismarck, North Dakota, and Tempe, Arizona. The huge center is easy to find and regularly sponsors two-hour introductions to the sport that cost $40 per session or $130 for a five-to-six-session curling course and mini-league membership. Taking part requires a strong back; the so-called rocks that curlers slide along the ice weigh 42 pounds. But four years from now, during the next Winter Olympics, you'll be one of the lucky few in the know.