You get about 10-15% at Apple and Dell, 15-20% at Cellular providers. There are perks with rental cars and merchandise in stores in Evanston, but I don't use them often.
Cell phone carrier discount (20%) among all sorts of restaurant discounts throughout Evanston and Chicago
With employ card (aka Wild card) you get discounts in local area and Chicago
I have taken classes and they are at a significant discount and we have the Wild Card which provides you with discounts all over town.
Variety of vendors and companies offer discounts. There's a section of the HR website that lists these.