Rosemont has tons of really good steak houses right near the convention center including a Capitol Grill, Mortons, Gibsons, Ruth's Chris, McCormick and Schmick, Harry Carays, as well as a new restaurant "park" with an awesome Hofbrauhaus and lots of smaller places. Hofbrauhaus is a traditional German beer hall and it's within walking distance of all of the Rosemont hotels (close enough). Great beer and food that is made for people who are drinking beer.
Cheers,
Jack