I was always uncomfortable singing at the meetings when I was a kid. As an adult, I rarely if ever sing anymore because I think it is a joke. There is no life to the music, no emotion, no "soul".
Stand up, Sing for 5 minutes
Sit down, listen for 45 minutes
Stand up, Sing for 5 minutes
Sit down, listen for 45 minutes
Stand up, Sing for 5 minutes
Lather, rinse, repeat.
My wife used to get upset at me for not singing and I would tell her that I just don't like to sing. But that's not really true. I like to sing along to a good song if I am alone in the car, or if I am at a concert. I just don't like to sing boring, non-melodic, propaganda songs at the hall.