This seems like a new trend, I have found 2 places that have outstanding 1/2 price burgers!
I was reluctant to post, cause I don't like waiting for a table, but it's too late, the word is out and at least one place I will mention is now jammed.
On Wed nights, it's Dunlays on the Square in Logan Square. Gotta say, a wonderful place! 4 buck burger with cheese, it's great. On that note, I do not think this same burger is worth 8 bucks on any other night, but for 4 bucks, the place is packed.
Last I heard, At the Candlelight, 7452 N. Western, they had 1/2 price burgers on Mondays. I was there on a Sat. the burger was one of the best I ever had, plus their garlic fries, are killer.
If there are other places you know of, offering burger deals like these, bring them on!