^^
Ditto agzg's advice about the SkyLedge, Giordanos and Portillos!!
Also visit Millenium Park (check to see if there's going to be something going on when you're here at this website:
http://www.millenniumpark.org/)
P.S. I'm so jealous of your trip. I was just realizing that there's a bunch of major U.S. cities that I want to visit. I totally want to visit your list (minus either Dallas or Houston and plus St. Louis!)