This small Grocery store on Halsted south of Jackson in Greektown is great. They have many traditional Greek foods, from frozen spanakopita to huge jars of olives to giant vats of olive oil. I suspect this store sells to the tons of Greek restaurants in the area, but is also good for regular people. I got help choosing a couple of Greek wines based on my tastes. There is also a lot of American food in the same rows of ingredient after ingredient labeled in Greek. This is a great place to run in and get a staple if you live in the area. There are large spices for just $2,99, compared with the $5ish plus you would pay at the Dominick's down the street for a small bottle. There was no line at all to pay. I would recommend this place to tourists and locals alike.
Pros: Lots of Greek foods, great value, no lines to pay, location in Greek Town