Cali the man-magnet!
My cats scatter when someone rings the bell or knocks. Well, most of them. Mousie, Shadow and Shasta are the only ones who will remain hidden, the rest cruise about. If the guest sits down, BooBoo is in their lap giving them a headbutt...however the BEST...is Squirrely-Jo. We call her the WalMart Greeter. Anytime someone comes in the house she runs up to them, tail in the air and screeching the loudest meow so they will notice her.
If I happen to see the person in the driveway and open the door before they knock/ring, after they come inside, I will call: "S-Jo, so-and-so is here to see you!" and she comes running and meowing her greeting. She loves people.