When it comes down to it, therapy is a service for you so you have the right to say what you want to do there. I know it's easier said than done as some therapists take the approach that they know better than the client and are 'treating' the client - however you are still paying for the therapy hour and so you do have the right to make clear you don't wish to use a specific technique. I wish I'd made clear I absolutely hated the gestalt chair thing and I still feel angry when I think about how I was almost forced into it. Never again.