Prim42

I'll answer what I thought when I made the comic. You can still interpret in your own way. It sounds like a fun idea.

In my setting, I intended for bar guy to be the only one who remembers everything. He dies a lot that he's now aware most guests could be both humans and visitors.

When bar guy confronts his murderer(s) from the past loop, they would say he's crazy and he later gets killed again. When he warns the homeowner about a potential visitor, the homeowner usually doesn't trust his words or shoots him. He doesn't bother with anyone anymore and just stays in his corner. Maybe rolling his eyes or sighing deeply when he sees a guest that killed him before in the house.