Any place of business to which the public is admitted wherein six or more electronically, electrically or mechanically controlled amusement machines are maintained as the primary business or any place of business where the area devoted to the machines constitutes 20% or more of the usable floor area of the building or unit in which they are located.
(`78 Code, § 17.04.268.) (Ord. 1982 § 2, 1990; Ord. 1649 § 1, 1982.)