Cathy,
Victor and I have often found ourselves hungry in this area at night, so here are some thoughts:
Yes, the Atwood Cafe on the first floor of the Hotel Burnham is excellent, though expensive. It is also a very beautiful space (and fun to peek at the gorgeous old elevators on your way in) with great service.
Close by, I'm also fond of Russian Teatime (on Adams, right off Michigan)-- though I know some folks think it's not so great and too expensive, I've always enjoyed the food and the atmosphere.
Some people like Rhapsody, a few doors west of Russian Teatime, but I didn't find a reason to go back after the first visit.
Further west on Adams is 17 West (formerly the Berghoff Restaurant). I had lunch there once, and it was just fine. I think they have most of the same things the Berghoff had, with maybe some more typical contemporary bar-restaurant items added.
Also in the area, you could check out Trattoria No. 10 (10 N Dearborn), which has good food and--if you're there between 5 and 8--a nice buffet at the bar for $12.
You could also cab it over to Greektown for 5 bucks or so, and then eat at Venus (the Cypriot place--the lamb in foil is amazing) or Santorini (the best Greek one, I think).
Or, if your speaker is adventurous, you could hop the Red Line (available right on State Street, just outside the hotel) down to Chinatown and take him/her to LTH or another favorite.
Hope this brain dump doesn't come too late to be of use,
Deb
Atwood Cafe
Hotel Burnham
1 W. Washington Street
Chicago, Illinois 60602
Tel: (312) 368-1900
Fax: (312) 357-2875
http://www.atwoodcafe.com/
Russian Teatime
77 East Adams St.
Chicago, IL 60603
Phone: (312)360-0000
Fax: (312)360-0575
http://www.russianteatime.com/
Rhapsody
65 E Adams
312-786-9911
http://www.rhapsodychicago.com/index.asp
17 West
17 W Adams
312-427-3170
http://www.17westchicago.com/
Trattoria No. 10
10 N Dearborn
312-984-1718
http://www.trattoriaten.com/
Venus Greek-Cypriot Cuisine
820 W. Jackson
Chicago, IL 60607
Tel (312) 714-1001
Fax (312) 575-0549
http://www.venuschicago.com/
Santorini
800 W Adams St
Chicago, IL 60607
(312) 829-8820
http://www.santorinichicago.com/