Here is the list of all the food and beverage locations:
http://flychicago.com/PassengerInfor...Beverages.aspx
I also suggest stopping by one of my favorite airport stores anywhere if you have the chance. Local artists, various mediums, quite eclectic.
Hoypoloi Art Gallery
Type: Store
Description: Accessories & Gifts
Location: After Security | Gate/Area: B6
Hours: 7AM -9PM