I know you saw these, but for public reference:
viewtopic.php?f=14&t=17845viewtopic.php?f=14&t=14432Reservations are one of your key issues. My three top favorites for cuisine (Corea, Rajun Cajun, Dixie Kitchen) won't suffice for a pre-arranged group of that size, so then you're into a second tier of decent but not heartwarming places that can handle a crowd:
Piccolo Mondo
1642 E 56th St
Calypso Cafe
5211 S. Harper
http://www.calypsocafechicago.com/La Petit Folie
1504 E. 55th
http://lapetitefolie.com/Cedars Mediterranean Kitchen
1206 E. 53rd
http://eatcedars.com/default.aspxI would not risk the Medici, Florian, pizza places, Kikuya Japanese, or the Thai places (except MAYBE Snail, at least they're friendly) if you want reasonable attention, nor Mellow Yellow, nor the new Chant, which has a beautiful design but utterly soulless food.
I normally recommend The Nile over Cedars (the former having much better food, particularly the shawerma, mossakhan, mo jadara, lentil soup), but Cedars handles groups with more finesse. Piccolo Mondo is a nice quiet room with solid Italian food (go with the specials), La Petit is very good but gets fussy and expensive for dinnertime (better at lunch), so Calypso probably has the fewest warning bells for your request.
Keep Chinatown (particularly Lao Sze Chuan, they might be able to save something for you upstairs) in mind, as well as Cuatro (
http://www.cuatro-chicago.com/) and Blu 47 (
http://www.blu47restaurant.com/), which deserve some attention not too far away. Good luck!