A subject dear to my heart...
I had a very negative attitude toward anything "Mommy and Me." When I had my first son, I was teaching and many of the other teachers also had babies. Baby talk everywhere. So, after I had registered to take 2 English classes at ASU during summer school, arranged for day care, I got a thing in the mail from the JCC about a class for moms and toddlers. I don't know what possessed me, but I dropped the grad classes and took my kid to the group. There were like 25 women and their babies there. They also had a play group and a couples group. I started on a journey of all things toddler for 2 months! They broke me down. Everyone was nice, though much too obsessed with their kids. They thought I was weird because I dragged my kid to the gym with me to do aerobics everyday. A couple of months later, when I announced pregnancy #2 someone said," Oh, you're going to quit your job now, right?"
Like h*ll I was.
But, 25 years later and a move across the country, I still consider 3 of these people some of my closest friends. I might not see them for a year or two, but when I go back to Tempe, I slip right in and it's like I never left. Our kids have grown up remarkably similar, despite the distance.
My advice is find a group that you have something in common with and ignore the judgmental ones. I know that I never was able to "fit in" with any of my neighbors, because they were the same uptight, prudish types of moms you describe.