26-2-1 ASSEMBLING AT PUBLIC PLACES AND BUSINESSES.
(A) Drive-in Business. A drive-in business within the meaning of this Code shall be deemed to be any business where meals, sandwiches, cold drinks, beverages, ice cream, food, drink, or consumer services are served directly to or are permitted to be consumed by patrons in or upon automobiles, motorcycles, or other vehicles parked on the premises.
(B) Declared Public Places. For the purpose of preserving public peace, health and safety, the entire premises occupied by a drive-in business, together with means of ingress or egress, are hereby declared to be a public place;
(1) No person on the premises of a drive-in business shall race the motor of any motor vehicle, needlessly bring to a sudden start or stop, any motor vehicle, blow any horn of any motor vehicle, or cause to be made any loud or unseemly noise, nuisance or disturbance whereby the quiet and good order of the premises or the neighborhood are disturbed.
(2) The following acts or conduct of any persons entering a drive-in business or premises are hereby declared to be unlawful, and any person found guilty of any such acts shall be guilty of a violation of this Article:
(a) Entering the premises of any drive-in business with any motor vehicle of any description and parking such vehicle and leaving the premises (thereby leaving such vehicle parked and unoccupied), without express consent of the owner or operator of such business, in which event, such motor vehicle shall be subject to a parking citation or may be impounded subject to the usual impounding charges.
(b) Entering the premises in or upon a motor vehicle and using said premises for cruising, racing as a shortcut to another street or to annoy or endanger any person or persons or other vehicle or vehicles lawfully on said premises.
(c) For three (3) or more persons to congregate on the premises and linger or loiter at any location on the premises of any drive-in business, other than in the building or in a legally parked motor vehicle.
(d) For any person who, while on the premises of any drive-in business, in the presence or hearing of another, to curse or abuse such person or use any violently abusive language under circumstances reasonably calculated to provoke a breach of the peace.
(C) Posting Sign. It shall be the responsibility of the business operator to post on the premises in a conspicuous location, one (1) or more signs bearing the following legend in letters at least two inches (2″) or more in height and readable:
“CRUISING IN OR CONGREGATING AND LOITERING OUTSIDE A MOTOR VEHICLE IS UNLAWFUL. NO UNOCCUPIED MOTOR VEHICLES MAY BE LEFT ON THE PREMISES WITHOUT THE CONSENT OF THE OWNER.”
(See 65 ILCS Sec. 5/11-5-2)