Surely some point is being missed here, there are two things going on that are not the same thing. Firstly people meeting for a social occasion and playing music and singing together and the other to better ones own understanding of the music and instruments(s)to improve ones own competance. The crossover is that to be part of an ensemble that are very good can be breathtaking and exhilarating. I would like to think that I am not so selfish or self indulgent to sing some of the more obscure Non chorus songs at the on a Friday night because the majority of the people want to join in and want, if not need, the same old same old, the more self indulgent stuff is done around the kitchen table or in concert where people come to listen and sing. I personally have had some wonderful moments alongside some of the best but fridays are not for me they are for everyone else and enjoy being part of that, it's a night out!