Well, I had two requirements. I wanted to meet new people (being a painter is fairly solitary, and winters in Scotland long) and nothing beats ten intelligent and friendly adults eager to learn a new skill. Secondly, I have wanted for ages to take nine year old Ross and myself on a rather expensive residential course called Swimming Without Stress, but didn't think I could afford it.
So, two birds with one stone, and twelve people learning new skills.
simple, and fun