This is someone you can contact about OOT rooms in the Chicagoland area. I just e-mailed her with what I was looking for and she requests info from the places that meet your needs. Worked very well!
Chicago Convention & Tourism Bureau
2301 S Lake Shore Drive
Chicago, IL 60616
Business: (312) 567-8501
Business Fax: (312) 567-8472
Send Bureau your name, contact info,
# of rooms, and dates, and location,
and they will send out an RFP to area
hotels. The hotels will then send you
their proposal with rates.