"Fast-food business" means a retail prepared-food business operation in which at least three of the following circumstances apply to the business:
(a) It is conducted in a building having no more than 8,000 square feet of gross floor area.
(b) It is self-service in nature having no waitresses or waiters.
(c) It devotes less than forty percent (40%) of its gross floor area to customer seating.
(d) Less than fifty percent (50%) of the food products sold are consumed on the premises.