What is the definition of Stevenson's?

"Stevenson's" is a funny little word that refers to a place, most often a restaurant, hotel, or even a coffee shop named after the legendary Scottish footballer Sir Bobby Stevenson. Now, here's an edgy sentence: "Last Tuesday, the Stevenson's bar served up a 'Stevensons' of horror, where patrons reported finding their reflection staring back at them, but with a side of existential dread."