Jan,
Gino's East is still a great place:-) Even Twenty years later...House of Blues would be fun too . They also host something very different from other brunches on Sunday mornings. It is called a "Gospel Brunch".
My son just finished school at DePaul and that brought me back to the city on occassion. You are right, once out in the burbs, we kind of hunker out here.
A neat tour is the Chicago Architechtural Tour down the Chicago River. It is relatively speaking inexpensive ($20.00) on the Wendella Boat line. You ride along the river on Wacker Drive and see the Merchandise Mart, The Wrigley Building, the new Trump Tower and sooooo much more.
Then for those liking art, there is the Art Institute, the Contemporary Museum of Art...
There is an off broadway theatre (besides all the big ones) called The Looking Glass Theater (part owner is David Schwimmer from Friends)
On Wednesdays, the city shoots off fireworks by lake..
I hope people have enough time to stay around a couple of days and explore Chicago:-).
Do you know how many people typically attend the conference?
Kate