Strava: Run With Us
I use Strava. It's fun to connect with others and see where your running friends have been. It's fun to see your progression, or lack thereof. I tend to wane back and forth between using it, and abhorring it, as I feel the "trophies" and segments can give the user (me) a false sense of accomplishment. However, it can be a motivating tool.
Note: Merit Endurance "club" on Strava; Here.