We will be arriving at Ronald Reagan Airport at 10pm on a Friday night. After checking into our hotel in Dupont Circle, we will need to find dinner at a nearby restaurant. Can anyone suggest a restaurant with "nicer" type bar food that serves food really late?

You'll have a fair number of choices especially given you'll be arriving on a Friday night.

A few suggestions:

Kramer Books and Afterwards (bookstore and cafe)

Agora (mediterranean/greek)

Pizzeria Paradiso

Bistrot du Coin (french bistro - very busy and sometimes noisy)

Annies Paramount Steakhouse (steakhouse/breakfast)

Hank's Oyster Bar is open until 2 a.m. on weekends.

The bar at Urbana may still serve food, although I'm not sure.

I recommend Bistrot du Coin, too. It can indeed get noisy, but IMO it's convivial noise, not club-crazy, if you know what I mean.

We were in Du Pont Circle in March. Second on Hank's Oyster Bar or Bistrot du Coin.

Great! I'll look into Hanks and Bistrot du Coin. Thanks for the help

Long overdue update: We went to bistro du coin and it was fantastic! Loved the ravioli. I would highly recommend this place.