Md. Code, Alcoholic Beverages and Cannabis § 11–2502

(a) This section applies to an establishment that:

(1) includes a restaurant, hotel, club, room, dance studio, disco, place of public entertainment, and place open to the public; and

(2) is subject to a license issued by the State or the county other than a license issued under this article.

(b) An owner or a manager of an establishment under subsection (a) of this section may not serve, keep, or allow to be consumed by a customer alcoholic beverages from supplies that the customer purchased, reserved, or brought to the establishment.

(c) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 2 years or a fine not exceeding $10,000 or both.