After 10:00 p.m. no person shall permit any person to attend or take part in any public dance who has not reached the age of eighteen years, unless accompanied by a parent or guardian. No person shall represent himself to have reached the age of eighteen years in order to obtain admission to a public dance hall, or to be permitted to remain therein, when such person is, in fact, under eighteen years of age. No person shall represent himself to be a parent or guardian of any person in order that such person may obtain admission to a public dance hall or be permitted to remain therein, when the party making the representation is not, in fact, either a parent or guardian of the other person.