I bet most places will have a nice salad, chef's or caesar- you can order for lunch. even the italian might have antipasto for apps. I would 'practice' by having alot of salad from now till then so you know if there will be any nasty side-effects.

if you can let us know what part of chicago you'll be in, maybe someone can recommend a real famous place (not nec $$$$$) but a place you can pick. or do you think they always go to the same place? just don't go to giordano's pizza!!