I'm coming up from Louisiana in a few weeks for a conference located at the Hyatt on East Wacker. Dinners are scoped out already, but I'm curious about best ideas for lunch in between sessions. Our sessions don't always have a specific "lunch" time, so might need a quick one. Would like to grab a Chicago-style hotdog or similar quick, but especially local bite. I'm wondering what good places / carts / etc. you all might recommend in that area.
Thanks in advance!