Ten thousand people stand alone

A friend has been asking me to go with her to her yoga class for quite a while, and finally I relented after weeks of excuses and actual scheduling conflicts.
Once I got there, I realized exactly why I had been reluctant to attend.  I don't like group activities.  Or, I don't like group activities where the group is doing something specific, I don't mind being with groups otherwise.   When I said that aloud, which I did because the instructor asked me why I hadn't been coming all along, she and the others in the class laughed as if I was joking.  Yoga humor.