D.C. Mun. Regs. tit. 19 § 1499
As used in this chapter, unless the context otherwise indicates, the following terms and phrases shall have the meaning ascribed:
Mechanical amusement machine - any machine, device, or appliance, except music machine, offered for use by the public, as a game, entertainment, or amusement, whether or not registering a score, and irrespective of whether or not the element of skill in the operation thereof predominates over the element of luck, which may be operated or caused to operate by the insertion of a coin, slug, token, plate or disk; provided that nothing in this regulation shall be construed to authorize, license, or permit the display or use of any gambling device whatsoever, or any mechanism which has been or may be judicially determined to be a gambling device.
Mayor - the Mayor of the District of Columbia.
Video Arcade - any commercial establishment whose primary business is the operation of ten or more mechanical amusement machines.
D.C. Mun. Regs. Tit. 19, § 1499