Ponce is an adult baseball league; it's a little more laid back, but it's still hardball.http://poncedeleonbaseball.com/About_Us.html
But it has a little more focus on fun where everyone has to get a few innings in the field and a turn at bat. Pitchers are limited to 5 innings per game. But it's 9 inning games, 60 foot bags, and real baseball.
According to NABA, there's still a DC league. It looks like they merged with WARBL and went wood bat.
I was one of the NABA 30+ teams that jumped to the DCMSBL.