My therapist has a large waiting room but does the same as yours, appointments back-to-back and never late. I have terrible phobia of being late, so I am always there way early. I don't mind waiting but I am surprised that my face does not spell LEAVE ME ALONE. I really do not want to talk when waiting, and you are right, some people are very chipper. I find it terribly difficult that my therapist also has couple of patients who will stare at the door where one will exit after sessions. It's awful to step back into the waiting room where someone is intently eyeballing you the whole way to the coat rack. If that's you, please leave me alone!