I am going to Autorama on Saturday with my wife and in-laws and was curious as to where to go to eat lunch?

I don't want to walk too far [[supposed to be cold and crappy and I'm being a pussy) from Cobo Hall, 4 blocks and something that isn't too expensive [[say $12.00/pp not including drinks).

Does anyone know if you can re-enter once you leave?

Any suggestions would be appreciated.