[giaour]

There are plenty of dense, walkable "towns" within the DC metro area. Some (like DuPont circle) are in DC proper, while others are in VA or MD. There is no shortage of suburban sprawl surrounding DC, but the dense areas tend to be cheaper, well-connected to transport, and have a decent nightlife and character in their own right.

Before making a decision, take a look at Frederick, MD; Old Town in Alexandria, VA; Clarendon, Ballston, and Rosslyn in Arlington, VA; city of Falls Church, VA; and Reston, VA.

Baltimore is also within commuting distance