I third Keefer's, I love it there. Delicious food.

Also, I was at Weber Grill about two weeks ago and was not too impressed. The appetizer sampler platter was delicious, but the entree (I had some type of fish, it was a special - I forget exactly what it was, so obviously the meal was not too memorable) was pretty lackluster. The two people I went with each got steak and both said that it was nothing to write home about. There are many other places I would go in Chicago before Weber Grill, starting with Keefer's.