We visited a block in a neighborhood not far from us. We found quite an enjoyable bar, a restaurant, a used clothing shop and a comedy club/jazz club.
Rock Creek is an amazing park and spring is a good time to explore it. You can see things that the leaves normally hide. I like to look at the trees without leaves and figure out what type of tree it is. There are lots of people exercising and enjoying nature all the time, but there are still little nooks to find escape in. It is mainly very quiet. For bicycling there is a long stretch of road to ride that is about half car-free all weekend. There is even at least one horse stable and some horse trails. Something for everyone. On the Maryland side is the old Audobon Nature Center.