Turns out there is such a thing as free lunch! El Floridano is giving deep discounts ($2 to $6 off) and yes, free lunches. If you're in Northern Virginia, there's a cluster of trucks in Crystal City. Full list of locations and a map after the jump.
Georgetown Law (First St. and New Jersey Ave., NW), where you'll find That Cheesecake Truck.
Metro Center (around 12th and G sts., NW), where you'll find a Sâuçá truck, Pleasant Pops, and Yellow Vendor (12th and F sts.).
Navy Yard (Fourth and M sts., SE), where you'll find Sol Mexican Grill, Basil Thyme (Yards Park), Dippin Dots (Yards Park), The Ficelle, and Eat Stix (Yards Park).
Northern Virginia, where you'll find the Big Cheese (Crystal City), Red Hook Lobster (Rosslyn), Choupi Crepes (Rosslyn), Bada Bing (2200 Crystal Dr., Crystal City), Capital Empanadas (23rd St. and Crystal Dr., Crystal City), Doug the Food Dude (Courthouse), Curbside Cupcakes (Pinky 3's stops at Courthouse Metro, Pentagon City, and Crystal City), District Taco (Rosslyn), and Bratwurst King (Reston Zoo).
State Department (21st St. and Virginia Ave., NW), where you'll find Sabor'a Street.