All persons conducting entertainment where dancing by patrons or customers is permitted, shall have in attendance at the premises for the purpose of supervising the dancing and the conduct of all patrons and customers, a duly licensed and uniformed security guard at all times such dancing is permitted or allowed. However, the provisions of this section shall apply only to those establishments or premises where a dance floor or area in excess of one hundred (100) square feet is available or designated for dancing by customers or patrons.