Here is a list of restaurants that were given to me.
I am hoping to at least try Old Ebbit Grill. I haven't researched yet how close they are to the hotels. That is on my to do list within the next month.
Busboys and Poets (DC, MD, VA) --- has several locations and vegan selections
Sticky Fingers (DC) -- all vegan, good for breakfast (Farewell, which I've never been to, is owned by Sticky Fingers and is a vegan restaurant.)
Yuan Fu (Rockville MD) -- vegan Chinese restaurant
I second the nomination of Jaleo ... https://www.jaleo.com/location/washington-dc/
If you do eat at Jaleo, try the "Pan de cristal con tomate" ... so good, one reason is that José Andrés gets the bread flown in from Barcelona.
But skip dessert there and walk (<10 minutes) to Central on Pennsylvania Ave for either Michel's Chocolate Bar (named after Michel Richard) or the Chocolate Mousse. Also, you could always eat at Central ... http://www.centralmichelrichard.com/. , though that recommendation comes from someone who has had the same thing every time ... the cheeseburger with bacon, it's way beyond the whopper or quarter-pounder.
One more, Estadio, 20 minute walk from the convention center: http://estadio-dc.com/. Tapas menu and yes, you can get a bowl of mini-chorizos ... Roasted Baby Chorizos & Potato Crisps
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