Actually, I started out by replying to your original post where you said your son was 10 months old. Then I guess when reading fullofbull's reply, I didn't realize you posted again, which was a reply to me and I thought I was quoting fullofbull. Sorry for the confusion.
While a 10 - 11 mo old is older than 7 mos., I just think it's unnecessary to be socialized in organized play groups that young. Children at that age (even age 1) are not seeking to make friends or establish friendships. They are very self-centered at that age, (as would be expected) and it's not unusual for children to
not play together very long, if at all, at that age. Even if you're encouraging it. At that age, they generally play by themselves, or play side by side ("parallel play") or around each other. But not necessarily "with" each other. That's just a normal stage of their development, not because of anything wrong with the child.
Pediatricians may certainly encourage it, and I'm sure there is nothing wrong in trying it out if you are so inclined. Moms need a break & a "mommy/child" group get together can be a very welcome change from a mom's busy day. But even the AAP recommendations for a 1 yr. old are a starting point. Childhood development has a wide range of "normal" - so your child's mileage may vary!
Anyhoo, as for the reply I was making to fullofbull - I wholeheartedly stand by my position that 7 months old is too young to expect them to play nice & think of anyone but themselves. And, since I mistakenly replied to your post (replying to me) I meant to be encouraging fullofbull to visit the AAP website, not you. Again, sorry for the confusion on my part. My bad.