I will be coming to Chicago for the second time next week for four days. Last time I was there, I had some great food as I went to Wiener's Circle, Jim's Original, Al's Italian Beef, Mario's for lemon ice, Walker Bros and Wishbone for breakfast, Pilsen for mexican food, Lou Malnati's for deep dish, Devon for south indian food, Billy Goat Tavern for a cheeburger, etc. I'm looking for uniquely chicago experiences that I missed last time. Have read mixed things about Hot Doug's but looks interesting. Also, any recommendations for not to be missed bars (or good beer bars) would be greatly appreciated. Thanks!