At locations where the primary purpose of the business conducted is the sale or serving of alcoholic beverages, no exhibitor or owner of a mechanical amusement device shall permit any minor under the age of eighteen years to use or operate any such device at any time that the serving or consumption of alcoholic beverages is permitted unless:
(a) Such device is located in a room in which the serving and consumption of alcoholic beverages is prohibited and such room is separated, by floor-to-ceiling walls and doors which are kept closed except where used by an individual for ingress or egress, from all rooms in which the serving or consumption of alcoholic beverages is permitted; or
(b) Such minor under the age of eighteen years is accompanied by a parent, guardian or adult relative.