362 Source Tips
Just down the street (1300s) is ACKC, an excellent chocolate-centered cafe.
I found parking on 14th, but make sure you get there at least a half hour early just in case.
If you want a drink after the show, Cafe St. Ex is practically right next door to the theater.
Try Le Palasio, el salvadorean restaurant across the street, very good.
U Street area is only a couple of blocks away if you're looking for a post-theater meal.
You can buy snacks at intermission and that goes to support the theater
I would take the metro. There are not alot of parking on 14th street.