As Mike G and YourPalWill have mentioned on occassion, Erwin is a much overlooked mid-priced destination. Based on a new promotion they launched, it looks like Erwin needs some foot traffic.
According to Chicago Mag's Morsels e-mail dispatch, if you spend $60 or more at Erwin, they'll give you $20 off your dinner check. And if you pay them a visit during the remaining weeks in March, they'll also give you a voucher for a $20 discount once a month for the rest of the year.
It's tough to beat that deal.
Following is the link to Morsels, and below is YourPalWill's assessment of Erwin's burger.