The confusion about plurals vs. possessives continues. Such problems tend to turn up in signs or advertising (as noted here). This example is from the start of a story in The North Raleigh News. The restaurant in question has two owners, as explained later in the story, so let’s change “owner’s” to “owners” in that first sentence. And yes, the establishment has “Clubb” as parts of its name. We’ll have to live with that.