Coloradans aren't new to combining sports, like Trey and Matt's BASEketball, which merged the pace of the MLB, the shooting of the NBA, and the viewership of the XFL. For a hybrid sport that more people will probably see, try out the Denver Area Underwater Hockey Club.
A 6-on-6 contest combining elements of ice hockey, snorkeling, and water polo, the co-ed Club plays twice-weekly on the the bottom of a 6.5ft pool in Lakewood, with opposing teams going black vs. white instead of shirts vs. skins, as they apparently find the human body more objectionable than a simulated race war. Armed with a mask/snorkels, fins, waterpolo headgear, waterproofed gardening gloves, and 12" wooden/plastic sticks (many handmade by their wielders), players cover assigned areas (which vary with positions like leftback/ swingback/ halfback), and work to score a 3lb lead core puck into a three meter, underwater goal that's goalie-free, as there's no time of day when Goldberg hasn't eaten within the last 30 minutes. The club sandwiches drills between self-ref'd 30-minute games, where fouls include "gloving" (using the glove to push the puck) and illegal substitutions (when a player doesn't fully exit the pool before another enters), and generally result in the other team being awarded possession, making it impossible to tell whose puke is due to the presence of a demon, and who's just really out of shape.
Established players can join the team on trips to play in tournaments across the western hemisphere (from Nashville to British Columbia), and newbies are welcome to try it out (with gear provided) up to three times for free -- also the same price at which most people would consider seeing BASEketball II.