I actually have one today and I'm trying to be "back" so here goes nothing.
Our DCP is gone on vacation this week so we've been 'taking turns' with our parents to cover caring for DD during the day. Yesterday I took the day off and saw that there was a baby/toddler time group at the library in the morning (I had to go there anyway to check out a couple books) so I decided to take Audrey. She had a good time but man, those SAHM moms were clique-y. I tried starting up conversations with the other moms, but I would be totally tuned out while they talked about their mom group events each day of the week and totally ignored their kids. The only mom I ended up talking and interacting with was one that worked part time and usually was working on Wednesdays. We had a pretty good time playing with our kids and talking. I'm sure that not every group is like this, but wow, I was not impressed and won't be wasting my time doing that again.