667 Dark Avenue is an apartment building in the city. It has 66 floors, with one apartment on each floor. There is one set of elevator doors on every floor, except on the 66th floor, where there is a second set of elevator doors. Despite this, elevator use is said to be not in style, and everyone uses the stairs instead. Residents of 667 Dark Avenue are obsesssed with the current trends and "in" things. The lobby is currently has a nautical theme, because sailors are very In. Due to flawed acoustic design, conversations from inside the apartments can easily be overheard from the stairwell.
The penthouse on the top floor boasts many kitchens, living rooms, dining rooms, breakfast rooms, snack rooms, sitting rooms, standing rooms, halls, ballrooms, bathrooms, and even rooms that seem to serve no purpose at all. It also include 71 bed rooms, 849 windows, and 612 clocks. There is one large library, which contains catalogs for "In Auctions" and other fashion-conscious books like Boots Were In in 1812.