I have an idea for a challenge type duo thing. Pretty much everyone would run against another person to compete to who can lose the most weight in a month. Kinda like the Biggest Loser. We could even do it as a bracket thing. I know in my past when I've compared my weight to my friend who is the around the same height, age, and weight... I tend to do better. Its a friendly competition! Not sure if that is a good idea or not.