When my dear children were little I belonged to a Mommy'n'Me group through the Adult Education Unified School District; most of the mothers were women I had gone to High school with, wo I was acquainted with them somewhat, but I was the kind of person who just always did my own thing.
The children played together in a room with toys, we had circle time, and then the mommies went in the other room and we had discussions about parenting concerns. I would listen and join in as was appropriate and "politically correct". I never stepped on anyone's toes.
I served on the Parenting Board and I wrote for our little newspaper. I participated as well as I could.
I kept my big mouth shut when the discussions turned to no-vaxing, breastfeeding, co-sleeping, etc. I did speak up when everyone was calling home birth mothers "dirty" and "ignorant"; I had more education than anyone including the "teacher" in the class, so I pointed out that home birth mothers are not ignorant and I am not "dirty" either.
It was an interesting study in human behavior.
I just kept my perspective and goal in mind....
...I went to the class to be with a group of mommies who enjoyed their children and I wanted my dear daughter and later dear son to enjoy the company of other children. I wanted to observ my children playing with other children in a safe and controlled environment.
Later, the school started to demand vaxing records, so I quietly excused myself.
I guess, in retrospect, I could have done something else, but at the time, I enjoyed this particular experience.