One of the therapists gave a talk every Friday morning, where he shared this exercise. He had a very stern manner, like some kind of military type, but taught this very gentle exercise.
Even at the time, I could see something quite funny about a room full of people who had hit rock bottom sitting in a circle tapping themselves on the shoulders and on the knees, and thinking pleasant thoughts.
He also taught Qi Gong, which I’d never done before. But I tried everything because I was desperately bored on my own, especially at weekends.