No public dance to which any person under the age of eighteen years may be admitted shall be conducted past the hour of twelve midnight on any school night, nor past the hour of two a.m. on any other day. For the purpose of this section, the term “school night” means any night preceding a day upon which public schools within the City are scheduled to operate as of the time of commencement of the dance. (Ord. 2546 § 2 (part), 2010: Ord. 1319 § 2 (part), 1986).