No, never happened to us. I think that would take a lot of balls on the part of the person approaching!
But to your deeper point: yes, we wanted community. I strongly suggest finding a Unitarian Universalist church in your area. We are so not religious, don't believe in any God, and are pretty much non-participants. That said, we LOVE our UU church (and yes, we get all eebed out when we say we "go to church").
But the community has made us so happy! Our 9yo DD LOVES going to the religious education, she has a ton of adult, teen age, and kid friends, we have adults that adore us and validate our marriage (which is so great for our daughter), and they CHEERED we we said we were pregnant.
It is a diverse, multi-cultural, supportive community where you can be involved as much or as little as you want. If there is a good one in your area, it may well be worth it to check it out.
And that's the thing, right? You don't want just ANY mommy group; you want a supportive, awesome, LGBTQ welcoming group! So now we have all these awesome friends, gay and straight, young and old, who welcome us with open arms.
It feels awesome. : )