I don't have a usual place where I sit or stand with clients. Often, if at their home, we start out at a kitchen table. Sometimes they want to show me things in other parts of the house so I go with them.
If at my office, I sit at a table with the client sitting at the table with their chair closest to the door. I have been stalked by a couple of former clients and threatened a few times. It comes with the territory.
Gang members often like to show they have weapons on them. My psychotic clients can be unpredictable from time to time.