Hosted annually by the Denver Run Club, the Beer Mile requires participants to chug a beer and run a 400-meter lap — then repeat three times. Beer Miles are held all over the country, and Denver's most recent version was held on St. Patrick's Day, naturally. It's BYOB — and make sure you come with the strong stuff (at least 5 percent alcohol by volume), or don't come at all. All beers must be twelve ounces, as well. Oh, and if you throw up, you have to do a penalty lap.