Gold, like green, signifies wealth, abundance, and money. Flanking the walls of The Gold Room (having an entire room called The Gold Room) flaunts that idea; much like America and American Culture.
Euphemistically, the products within The Pantry (No.16, No.69) can also be counted within this space.
In this image · No.3
Kubrick gets geometric. Using all 3 axes to correlate connections. Jack and the male employee, the sets of chairs on both the left and right side, and the colors within the Gold Room space: the red, the black, the gold, all reflected on the floor design in the art deco sun and the Native American banding.