(a) Class A licenses issued for social, fraternal or private clubs shall authorize the licensee to sell nonintoxicating beer at retail for consumption only on the licensed premises where sold. All other Class A licenses shall authorize the licensee to sell nonintoxicating beer at retail for consumption on or off the licensed premises.
(b) A Class B license shall authorize the licensee to sell nonintoxicating beer at retail in bottles, cans or other sealed containers only, and only for consumption off the licensed premises. Sales under this license to any person at any one time shall be in quantities of less than five gallons. Such license may be issued only to the proprietor or owner of a grocery store. For the purpose of this article, the term "grocery store" means and includes any retail establishment commonly known as a grocery store or delicatessen, where food or food products are sold for consumption off the premises.