The club challenge feature is good; however, it could be improved with added functionality. Please explore the option of expanding it so a single challenge could include multiple goals combined. The specific example I can see that would be most useful would be for a triathlon challenge. You could create a challenge for your club members to complete a certain triathlon distance within a certain timeframe. For example, create a club challenge to complete an ironman triathlon distance within a month. This would involve completing 2.4 miles of swimming, 112 miles of biking, and 26.2 miles of running. They would have to complete all three distances within the given timreframe to "complete" the challenge. Right now, I can only set a challenge for a total distance which doesn't really work since someone could just ride 150 miles and not do any swimming or running and complete/win the challenge.
These kinds of multi-sport challenges are very common in virtual competitions around the world. It is a great way to inspire club members to continue to train in the off-season across all disciplines.