Fresh Appetizers by Chef Paul is a Waukegan caterer I am friendly with. His website offers location suggestions for parties, while most won't suit your situation, two might:
Herald Washington Library
website::
http://www.chipublib.org/001hwlc/corpevents/cpe.html
400 South State Street
Chicago, IL 60605
Phone: (312) 747-4999
Capacity: Several room choices available.
Maximum 550 guests.
Price Range: $400.00-$3800.00 per day
not including setup, dance floor, kitchen use, or Audio Visual equipment
Available on site: Tables, Chairs, Dance Floor, Audio Visual Equipment.
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Cheney Mansion
website:
http://www.cheneymansion.com
220 North Euclid
Oak Park Illinois 60302
Phone: (708) 383-2612
Capacity: Several room choices available. Maximum 150 guests indoors,
350 guests outdoors.
Price Range: Call for information
Available on site: Tables, Kitchen, and Grand Piano.
Regards,