JudeL, yes I think I knew some of the choir people who were in the silly song session. My bet would be that it was Miguel, our illustrious leader, and maybe some others. I think I might have even seen some photos. Any chance of seeing yours?
BTW, did you meet Rhymin' Simon - long beard, deep voice, came back with Micca's song The Hash My Father Scored, and has sung it quite a few times since.
Unfortunately my enjoyment of that tour was marred several times by the killjoy attitude of the person I was with. Thankfully we are no longer together, and I just hope I might one day get another chance to travel in more congenial company, or even by myself, so that I can do all the things I missed out on the last time - and yes, silliness is definitely on the agenda!