The Diner Adams Morgan in Washington DC is the 18th Street 24-hour diner from the Tryst Coffee House group, with all-day breakfast, burgers and a deep.
Try: Diner classics, all-day breakfast
Tip: The bottomless coffee runs $4; the patty melt with onion rings is the 03:00 editorial order.
Pizzeria$$Tue-Thu 18:00-03:00, Fri-Sat 17:00-04:00, Sun 18:00-03:00Until 04:00 nightly
Pizza Mart Adams Morgan in Washington DC is the 18th Street late-night jumbo-slice counter open until 04:00 every night, one of the two original claims.
Try: Eighteen-inch jumbo slice
Tip: One jumbo slice for $7 walks two people home; cash moves the line faster than card past 02:00.