 WTOP's Gigi Barnett explains. Matt Green doesn't run for the love of fitness. He has other motivations. To just say, like, you know, I just woke up one morning and I just loved it, it's like, no. It's the community, it was the connections, it was the cool factors. That's why social running is growing in D.C., especially among athletes of color. One of the biggest running clubs spurring the drive is the District Running Collective. Green and three college buddies started it in 2013. It's morphed.