Caribbean food in DC?
Teddy's Roti Shop on Georgia Avenue (almost in Silver Spring) has solid Trini food. The prices are pretty high, but all of the rotis and buss up shuts are enough for two meals.
I know you didn't mention Jamaican, but Pimento Grill in Anacostia gets rave reviews. Sweet Mango Cafe in Petworth is also decent, and it's right on top of the Metro, making it far easier to get to.
A lot of posters seem to ask about Puerto Rican food, but there's not a large Boricua community here, at least not compared to the northeast.
Sweet Mango Cafe
3701 New Hampshire Ave NW, Washington, DC 20010
Pimento Grill Restaurant
4405 Bowen Rd SE, Washington, DC 20019
Teddy's Roti Shop
7304 Georgia Ave NW, Washington, DC 20012