I came in close and gestured with my camera for permission to take a photograph. One of them half agreed and I took a Polaroid type instant photo and handed it to him.
This caused a great deal of interest and suddenly I was given a lot of attention and everyone at the festival was very keen for me to take their photograph. I had come prepared with a couple of hundred instant picture shots as I always felt it was a much greater gesture to offer a picture on the spot, rather than a promise of sending one months later.