No amusement activity regulated by this chapter shall operate, set up or be taken down between eleven p.m., and eight a.m., of the following morning, Monday through Friday, and between twelve midnight and eight a.m., of the following morning on Saturday and Sunday. The chief of police may further restrict the hours of operation of any amusement activity if such restriction in his or her judgment is necessary to prevent a public nuisance in surrounding residential areas. (Ord. 304 § 8, 1980).