740 ILCS 90/10: Refusal of admission.

A proprietor or manager of a hotel may refuse to admit or refuse service or accommodations to a person who:

(1) while on the premises of the hotel, destroys or threatens to destroy hotel property or causes or threatens to cause a public disturbance; or

(2) is seeking accommodations for the unlawful possession or use of controlled substances or the use of the premises for the consumption of alcoholic liquor by a person under the age of 21.