IT’s the Ronald Reagon Building and International Trade Center located at 1300 Pennsylvania Ave.
Here are my suggestions:
Aria Trattoria : it’s right there in the building, with indoor and outdoor seating in the courtyard. Good food too. But, a little pricey.
Chef Geoff’s is very popular. Located on 13 St NW between E St and F St. Again, a little pricey, but a Three course pre-theatre meal (4-6:30) is ~ $25. You can a bit cheaper with their wood pizzas and great burgers.
My favorite joint is HArry’s Restaurant which says it’s on 11st St., but the main door is actually on E St. Friendly pub atmosphere. Lots of regulars, the only non-snobby place downtown IMO.
there really isn’t too much cheap food in that section of town. Harry’s is the real exception.
But, since you’re going to the theater, you might consider the pricier options. Which would put Tosca’s on the list too.
Old Ebbitt Grill can be affordable if you stick to sandwiches and lighter fare. There may be some vegitarian choices too with that. It’s on 15th St between F St. and G St. The historical factor is worth it if you’ve never been.
Here’ my take: If you want inexpensive, go to Harry’s. It’s friendly and fun. For DC experience go to Old Ebbitt’s and for the theatre experience go to Aria’s right there at the Reagan Building.
have fun. It’s a nice show. lots of fun.