Starbaby, unfortunately Chicago is a non-double-coupon city. (It seems cities either are or they aren't--goes into the competitive nature of the local supermarkets).
Anyway, only place I ever found 2x coupons in CHI was at Eagle, and that was about 2 1/2 years ago. I haven't lived there fulltime since (with time to look for things like that).
You also might try Meijer out in the SW suburbs.
JL