A culinary gem, Danada Deli and Pantry in Wheaton is a hugely-popular spot for terrific soup and good sandwiches. It's a popular restaurant for guests that want fantastic food.
No specific attire is required, so feel free to dress casually and comfortably. Also, though the overall price can be a bit on the low side, you won't be sacrificing any quality. In fact, you should be able to enjoy a good meal for $11 or $12, and can probably get in and out for $8 if you try.
In addition to its convenient take-out offerings, the restaurant even provides catering for events around town.
A reputable favorite for both lunch and dinner, Danada Deli and Pantry is a tasty choice when you're in the mood for unique international cuisine, and want to break away from the regular ol' Chinese/Mexican/Italian fare. Don't worry about trying to find a spot on the street, as visitors to the restaurant do have access to a private parking lot nearby.