53 Pa. Stat. § 4734
From and after the first day of June, one thousand nine hundred and nineteen, it shall be unlawful to hold or conduct any public dance or public ball, or to hold or conduct classes in dancing, or to give instructions in dancing for hire, in any hall, ball room, or academy, within the limits of any city of the first, second, and third class, within this Commonwealth, unless the dance hall or ball room or academy, in which the same may be held, shall have been duly licensed for such purpose.
Application for such license shall be made by the proprietor of such dance hall or ball room or academy to the mayor, who is hereby authorized to issue the same.
The fee payable for each such license granted hereunder shall be as follows:
In the case of dance halls maintained and conducted in connection with regularly established instruction in dancing, and exclusively used in such connection, the annual license fee shall be thirty-five dollars in cities of the first and second classes and ten dollars in all other cities.
In the case of all other dance halls and ball rooms, the annual license fee shall be forty dollars in cities of the first and second classes and fifteen dollars in all other cities.
Each license granted hereunder shall expire on the first day of June of each year.
The fee payable for each license granted hereunder shall be for the whole or any portion of a calendar year, and all moneys received by way of license fees hereunder shall be paid into the general fund of the city.
Every licensed public dance hall or ball room or academy shall post its license in a conspicuous place within the hall where the dance is held.
53 P.S. § 4734