D.C. Mun. Regs. r. 23-710
As used in this section, the phrase "minimum charge" means a price or fee imposed by a licensee on a patron or individual for food and/or beverages, either at the point of entrance to an establishment or at the point of service of food and/or beverages within the establishment.
The minimum charge must be equal in value to the price the patron would pay for the food and or beverage(s) inside.
A minimum charge shall not be considered a cover charge and may be charged by an establishment without Board approval or an entertainment endorsement unless restricted by Board order or settlement agreement.
Any holder of a Retailer's license Class C or D, who makes a permitted minimum charge for either food or a beverage, shall, during the hours when the minimum charge is made, keep posted in a conspicuous place at each public entrance to the room or place where the minimum charge is made a sign stating that a minimum charge is made, the amount of the minimum charge, and whether the minimum charge shall be applied to food and/or beverage(s).
The sign required by § 710.4 shall be not less than one square foot in area with lettering not less than one inch (1 in.) in height, and the letters shall be easily legible.
D.C. Mun. Regs. r. 23-710