SnotBubbles
The best place to go is a pizza/Italian joint called Papa Dels. I hit it up every time I'm there. Deep dish/Chicago style pizza that actually competes with real "Chicago" Style Pizza.
If you want just a quick, local dive; there is a great sandwich place called Fat Sandwich Company. Don't wear Buckeyes stuff in there though. It's a U of I place.
While you're there make sure you drive past Memorial Stadium. The beauty of it is far underrated (mostly because it's unknown because we suck at football).