Md. Code, Alc. Bev. & Cannabis § 9-2501

(a) (1) An individual may not possess or consume an alcoholic beverage during the hours stated in paragraph (2) of this subsection in an establishment that: (i) is not licensed by the Board; but (ii) is: 1. a restaurant, tavern, hotel, club, dance studio, or disco; 2. a place of public entertainment; 3. a place open to the public; 4. a place that is licensed by the State or the county; or 5. a place at which setups or other component parts of mixed alcoholic drinks are sold. (2) The prohibition under paragraph (1) of this subsection is in effect: (i) from Monday to Saturday, from 1 a.m. to 7 a.m.; and (ii) on Sunday, after 1 a.m. (b) An owner or a manager of an establishment under subsection (a) of this section may not allow consumption or possession of alcoholic beverages that is prohibited under this section. (c) A person who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $500 for each offense.