Md. Code, Alcoholic Beverages and Cannabis § 25–2709

(a) Except as specifically authorized or provided in this article and except as provided in subsection (b) of this section, in a licensed establishment or other licensed premises that is open to the public:

(1) a person may not sell or provide alcoholic beverages; and

(2) alcoholic beverages may not be consumed.

(b) Subsection (a) of this section does not apply in the room of a registered guest in a hotel that meets the minimum requirements under § 25–904 of this title.