A social gathering or party which is conducted on premises within the city and which, by reason of the conduct of those persons in attendance, results in any one or more of the following conditions of events occurring at the site of the said party or social gathering, or on neighboring public or private property: public intoxication; unlawful consumption of beer, wine or alcoholic beverages in a public place; outdoor urination or defecation in a public place; the unlawful sale, furnishing, dispensing or consumption of beer, wine, or alcoholic beverages; the unlawful deposit of litter or refuse; the damage or destruction of property without the consent of the property owner; unlawful pedestrian or vehicular traffic; standing or parking of vehicles that obstructs the free flow of traffic on the public streets and sidewalks or that impedes the ability to render emergency services; unlawfully loud noise; fighting; or, any other conduct or condition that threatens injury to persons or damage to property is hereby declared to be an unlawful public nuisance.

— Sec. 17.30 of Nuisance Party Regulations,

City of Ames code