in the D.C. area, my wife and I decided to try "Johnny's New York Style Pizzeria and Restaurant," which we spotted in a strip mall with an Alexandria maddress, but that's geographically "Springfield," not far from the Springfield Mall. Needless to say, we weren't expecting much, but were at least heartened that the restaurant sells pizza by the slice.
We were pleasantly surprised, by both the regular slices and the sicilian. My verdict: pretty good. My wife's verdict: very good. Joint verdict: The best pizza we've had in the D.C. area.
Bonus: The owner is from Queens.
Extra bonus: The strip mall in question has an interesting used book store, and a supply store for preschoolers and young gradeschoolers that has many unique items.
New York pizzaphiles in D.C. exile will definitely want to check it out.
UPDATE: A reader informs me via email: "Although it operates under a different name, it's owned by the same folks who run Valentino's Pizza in Alexandria, on Beauregard Street, just north of Little River Turnpike/Duke Street. Both places serve the same pizza, but for some reason the "large" pizzas are larger at Valentino's.
If you didn't try the "Bianca" (white) pizza (no tomato sauce, but with ricotta, basil, and garlic), I heartily recommend it to you."
Unfortunately, I hate ricotta cheese.