Solo Dining Near White House

Even though I've been to the DC/Balitmore area a few times over the years this is my first post to the board. I'm looking for a few good recs for solo dining near the white house. I am fine with cabbing, walking, metro, but I will have many long days while in town and don't want to spend too much time in transit. I am staying at the W all week. No restrictions on diet .

As for types of food, I would love a couple of good gastropubs mixed with some great ethnic spots: thai, vietnamese, sushi, latin, etc. I am really open in this regard and DC is great for hitting up different cultures and flavors.

For cost, I would like to keep it somewhat reasonable and I'm fairly good on the higher end upscale spots (this board has those covered pretty well), but if there is a deal or bar at one of the nicer restos that would make sense for solo dining - feel free to bring it up. Thanks for the help.