If you like craft beer, Richmond is a great weekend trip, several world class breweries, some history, a nice art museum. Scotts addition is the main brewery/nightlife area

5 hours by amtrak, 2 to dc, 1hour engine swap in dc, 2 hours to Richmond.

Driving is highly variable, my record is 3.5 hours, but its been over 6 as well.

Unfortunately a driving city, so prepare to uber a bunch.