But wouldn't that depend upon the client? I don't really notice much about their offices other than that I like them to stay very far away from me. Others seemingly want the therapist closer. I want a large piece of furniture between me and the therapist. Others don't. I would prefer a conference room with a lectern for the client rather than a sofa or chair. And definitely I prefer chairs over sofas. I never noticed their pictures, books etc. I don't think they had any but they might have - I really did not pay much attention to how they decorate. Apparently others care very much.
And so on.

I don't want to spend my time teaching a therapist anything. I think those people need to learn to explain what exactly is supposed to be happening. What are they doing at the client at all times and how is it supposed to help.