Now and then I have worked at a place that had a sports team, mostly casual softball. I never gave much thought to who organizes those. In Bethesda, MD there is an organization called Social Sports of Bethesda that handles Football, Dogeball, Softball, and Volleyball (but not Kickball, that is done by WAKA). It looks like Social (ie drinking) is just as important as sports.
They are also one of the sponsors of the Bethesda Spring Bar Tour on Saturday March 28th from 1 to 9 pm.
[where: Bethesda, MD]