Oh, Oh! I just remember another, although not really public.

Every Christmas, when I was small, my Uncle would have my cousin and I stand on a stool and sing to a large family gathering. I particularly remember we did a really great renditions of Mr. Sandman, I've Got a Loverly Bunch of Coconuts and Your Baby Has Fallen Down Plughole. I really enjoyed that stuff, we got to choose our pieces and always got a quarter for our efforts.