Hi, I don't live in your area- but my son is 10 now and having gone through the whole 'meet new moms' things a few times I thought I would offer some perspective.
When my son was small we did Wiggleworms and Mommy and Me music classes, etc. and they were fun. The other moms were nice, but somehow I just never clicked with any of them enough for a regular playdate. There were other official 'playgroups' but they all seemed like you described- snobbish, lots of rules, etc. I just never felt comfortable.
I met my best mommy friend by accident on a freezing cold day when my 8 month old son and I were just SITR-CRAZY- ok, *I* was stir crazy- and had to get out of the house.
We went to a nearby coffee place that had a nice fireplace and play area. I sat down just to read the paper for an hour, my son in his carrier- and there was another tired mom, coffee in hand, with a son the same age in his carrier! We started chatting and just hit it off and exchanged numbers. The following week, we met again at the same coffee place.
By summer, we had a regular stroller date several times a week, walking off baby fat through neighborhoods all over town. She was shopping for a new house at the time, so we had a perfect excuse to pack up the boys and stroll around. We went to the mall on rainy days, and even to a movie or out for a drink WITHOUT our babies once in a while, lol.
My point is that all the organized playgroups in the world are only really going to socialize your child- not guarantee that you will make a friend. My son has been around kids of many different ages as he's grown up- kids of friends that I made, and later friends he made on his own. Now that he is 10, if he makes a new pal, I consider it a HUGE bonus if the other mom and I hit it off and become friends.
I hope you find a great playgroup- but don't worry too much about it. Hang out with your regular friends and go to parks, etc. You will make new mom-friends who will suit you and your personality. It has to be rough losing your job, but to look on the bright side, at least you get more mom-time now! Good Luck!