Farragut Square (17th and I sts., NW), where you'll find Carnivore BBQ, Curbside Cupcakes, DC Taco Truck, Far East Taco Grille, Little Italy, Popped! Republic, Village Cafe Express, Wassub; Pho Junkies (nearby at 20th and L).
L'Enfant (Sixth St. and Maryland Ave., SW), where you'll find Arepa Zone, Capital Chicken & Waffles, Dangerously Delicious Pies, DC Taco Truck, Peruvian Brothers, Saffron Food Lovers, Taste of Eastern Europe, and Yumpling.
Navy Yard (First and M sts., SE), where you'll find DC Crab Cake & Co.
Northern Virginia, where you'll find PhoWheels (Alexandria), Astro Doughnuts, Kafta Mania, Mediterranean Delights, Urban Bumpkin BBQ (Ballston), Tasty Kabob (Crystal City), Choupi Crepes, Willie's Po' Boy (Rosslyn), Fava Pot, Roaming Rotisserie, SweetArt, and Tortuga (Tysons).
State Department (around 21st St. and Virginia Ave., NW), where you'll find Beltway Latin Cuisine, Captain Cookie, DC Ballers, Far East Taco Grille, Italian Subs, Lilypad on the Run, Sang on Wheels, Steak Bites, and Lemongrass Truck.