Except as provided under subsection (b) of this section or otherwise provided by law, from 2 a.m. to 6 a.m. on any day, an individual may not consume alcoholic beverages: in an establishment open to the public; in a place of public accommodation; or in a place at which setups or other component parts of mixed alcoholic drinks are sold. The prohibition against consumption in paragraph (1) of this subsection is in effect if any form of entertainment, live or recorded, is offered at the place or at the establishment, regardless of whether the establishment or place is licensed under this article or other State law. By regulation, the Board may restrict the hours and days for the consumption of alcoholic beverages on the inner perimeter of a rectangle bounded by 31st Street on the south, Greenmount Avenue on the east, 32nd Street on the north, and Barclay Street on the west. The owner or manager of the establishment or place may not knowingly allow the consumption of alcoholic beverages that is prohibited by this section. An individual who consumes alcoholic beverages at an establishment described in this section or an owner or a manager of the establishment who knowingly allows the consumption prohibited by this section is guilty of a misdemeanor and on conviction is subject to imprisonment for not more than 3 years or a fine of not more than $5,000 or both.