Washington DC had no breweries that packaged beer between 1956 and 2011. This changed, and changed quickly, with the opening of DC Brau, which was quickly followed by many others. Washington DC now has 5 package breweries, 4 with Brewery Tours, and many other Brewpubs, Cideries, Distilleries, and alcohol production facilities. 

Recently, the Urban Atlas team decided to hit as many Brewery Tours as possible in one day. Like many cities, the breweries in Washington DC are located in areas of light industry, not usual tourist neighborhoods. However,  it will definitely give you a wider view of Washington DC, as well as it's very active brewery scene.