Princess is great if you're in the area and are looking for a quick, really cheap middle-eastern bite. It's a small grocery store with a small counter in the back where you can order snacks, pita sandwiches and cheese and olives. It's also a great place to go for spices, teas and other middle eastern cooking supplies.
I come for the Al-Wazah tea, which my Saudi friend always used to make. Also, for lunch (it's not too far from my work) I like getting a mix of grape leaves, falafel and hummus. Their hummus is OK but the baba ganoush is actually pretty good.
They have a lunch buffet, too, but I haven't been adventurous enough to try it, especially since I'm a vegetarian and most of the food seems meaty...
The place is also stocked with hookahs and other things, like calling cards and Quran-alarm clocks.