My MG hasn't started yet, but I was worried I might have the same problem as you. I've been lucky that my Antenatal Class only had 5 couples in it (all gave birth to boys) and we all caught up and have created our own "mother's group." I'm joining Gymbaroo this week, and going to a Mums & Bubs Yoga class as well.

Basically what I'm saying is that if your MG is not your thing, try something else. Even joining a Gymbaroo or Playgroup might be a good way to meet people. And you don't have to be friends with everyone - but hopefully you can click with one or two Mums/Dads and develop friendships (for you and your DD) from there.

ETA: My Doula has 5 kids, and she told me that the MGs she's been a part of have varied - some of them are full of women that she's remained good friends with, but others are the same as yours - the only thing they have in common is that they have babies and live in the same area. You're definitely not the only one to hit this problem with the MG.