Artopolis Bakery, Café & Agora

This always-bustling Greek spot is popular for good reason: The food is inexpensive, you get it fast, and it tastes great. The signature artopitas—flaky puff-pastry rounds with fillings like ham and kasseri cheese or chicken and mozzarella—take center stage, but there are also fresh salads, sandwiches and traditional Greek dishes like roasted lamb and a weekly regional special. Bonus: The front that overlooks Halsted Street is perfect for people-watching.