Well I did it, many thanks to you all for your helpful comments and kind words. Siobhan, your comments were extremely useful and intuitive, the reason I gave my talk there was because I was a regular visitor last year, and as you say, people can be suffering with various llnesses and emotions. With that in mind I did try to keep it light-hearted, even got a laugh or two, and I stressed that people need to be happy with their therapist, if they are not comfortable for whatever reason they should find another one. I will be going in on a voluntary basis so that people can get used to me being around. It has also been suggested to me that I should start with hands as it is less personal and intrusive, which makes sense.
To anyone who is thinking about doing a talk, do it, write your talk, condense it on to cards, and you will find yourself not even referring to them. Thanks again
Chris