Usually for Cuban food, I have to go to my house! There isn't a dense population of Cubans in this tri-state area, so your chances for a good cafe con leche or a pan con lechon are slim to none, unless you are eating at Casa Carmen! But there may be light at the end of the tunnel. One of the blogs I follow just posted a review of Cuba de Ayer in Burtonsville, MD. A bit far from us Arlingtonians, but the pictures actually look pretty authentic. I feel like a field trip is in our future!
Check it out here: http://ieatdc.blogspot.com/2010/02/cuba-de-ayer.html