How does the furniture showroom setting affect the story?

The furniture showroom setting in Backrooms establishes a mundane, everyday environment that contrasts sharply with the eerie and unsettling discovery of the strange doorway in its basement. This contrast heightens the sense of normalcy disrupted by the supernatural or mysterious elements, making the story's transition into the unknown more impactful and disorienting for the audience. The showroom's basement, typically a hidden or overlooked space, serves as a fitting entry point to the bizarre world beyond, emphasizing themes of hidden realities beneath familiar surfaces.