I sort of wish my T had a waiting room. His therapy room is part of his residence, which is fine except I like to get to my appt really early because lateness makes me anxious, but I hate sitting outside his house in my car for 20 minutes before the appt.
I told him not to feel like he has to see me early so I don't worry about that anymore, but I feel exposed for anyone who happens to be in his house or his neighbours' houses to see.
I once saw his wife (who is also a T) arriving home when I was sat in my car. I was having a really hard day and it freaked me out.