I'm a co-founder at Training Mobs (http://trainingmobs.com), an online health and fitness community that makes it super easy for people to find an awesome workout near them. We believe that providing a strong social component keeps people motivated to work out and keeps them coming back - our members tell us that it feels less like a workout and more of a social outing, since everyone is sweating it out together and having a great time. Anybody can post a workout (which we call a 'mob', after the Flashmobs concept but for fitness), and anybody can join it.
Right from the start, our core vision was to improve the health and lives of people by making awesome workouts accessible. Its free to join, and about half of the workouts are totally free. We also work with small, independent studios and personal trainers to provide our members with a great selection of workouts at really reasonable prices, often below the drop-in rate.
Phew, okay, corporatey schpeel over. But yes, we do believe that we have made some progress towards our vision of fun, accessible workouts that actually make you want to keep doing them as opposed to burning out and giving up. Search for us on twitter and read some of the tweets :)
Oh, and unexpected side-effects? It turns out that working out with 30 other people bonds you into fast friends surprisingly quickly! Strong friendship groups within the community also makes it all but certain that a member will continue to come to the site and workout with their friends.
