There's a couple on Meetup.com. I haven't been able to attend any of the meetups, but that's just because of timing. I'm going to try to make one this afternoon tho.
There's also Infancy to Independence (I-to-I) and The Parenting Center. I want to go take a look at TPC this week sometime to see about joining now that I can comfortably get out of the house with both little ones.
I'm in Laplace, too! How long have you lived here? Feel free to PM me if you need anything! I don't hang out on The Bump much anymore, but I do check it every other day or so.
I find a lot of the mommy groups are scheduled more to the SAHM than the working mom. Locally, the libraries do lapsits/storytime and some of the moms do their own playdates with people they meet at the those. The previous poster also mentioned a few that I've heard of, but never been to.