At Mangialardo and Sons (1317 Pennsylvania Ave. SE) you'll often see police cruisers, firetrucks and ambulances double-parked on the street out front during lunchtime.
Inside the shop, there's usually a standing crowd of people waiting with numbered tickets in their hands: construction crews in blue hard hats, painters in speckled pants and Smithsonian employees in rumpled khakis.
Source: http://www.washingtonpost.com