Atrium

The Atrium (or Attrium) is a location in Grand Theft Auto: San Andreas, located in eastern Commerce, Los Santos, used in the "Just Business" mission. Although little is known about this interior, it has several stories and has a statue depicting a man touching himself inappropriately. Some statues facing the one touching himself have their hands over their eyes. There is a body armor in this building and several unusable lifts.

Pickups

Body Armor

Glitches

Leaving the building through one of the doors (only one works) then entering it backwards with a pistol aimed forwards will enable the player to "ghost" through the door and into the actual interior, rather than the separate one. The floor here is, aside from a small square by the door, not solid, and the player can fall through it, entering Blue Hell.
When the player enters through the northern door, the ingame text says that the building is called the Atrium. When they enter from the west, it says Attrium.
Using a mod to allow CJ to go out of the building will result to CJ being in a partially detailed Los Santos

Gallery

Interior of the Atrium, as viewed to the north.
The Atrium statues at the lobby floor, as viewed to the south.