I go to Ray Johnson Seafood mostly to buy fresh fish. But they also have three or four excellent soups on the menu which you can take home (or to the park) in leakproof containers. Their fish sandwiches, desserts and side dishes are also excellent. The store is very clean, and the staff is helpful and funny. And they're located just a few doors down from the Hawk Gallery, which is always worth checking out.
Pros: inexpensive, good parking, fast service
Cons: good food, clean, a fun place