D.C. Mun. Regs. tit. 14, r. 14-1307
If a hotel or motel uses any sleeping room for the accommodation of a greater number of occupants than is authorized by § 402 of this subtitle, but not in excess of that permitted by § 1306, the increased density of occupancy (also referred to in this chapter as "high density occupancy" or "high density use") shall be permitted only if there is compliance with the conditions set forth in this chapter.
Each occupant of a high density use room shall be a transient.
The maximum number of occupants accommodated on any single floor of the hotel or motel shall not exceed one (1) person for each fifty square feet (50 ft.2) of the total habitable room area in all of the rooming units located on that floor.
High density occupancy rooms shall be provided with daily maid service which shall include at least one thorough cleaning of the room each day it is occupied.
Each high density occupancy room shall be given a daily airing, unless the room is mechanically ventilated.
The beds in each high density occupancy room shall be arranged so that the head end of each bed is at least three feet (3') distant from the head end of any other bed.
D.C. Mun. Regs. tit. 14, r. 14-1307