Babies don't NEED social interaction with other babies. They really don't. Even 2 year olds don't have "friends" as we think of friends.
Your hubby, otoh, needs friends. That's what infant playgroups are all about... not friends for babies, but ways to keep the mom's from going insane never speaking in full sentances in normal tones of voice.
20 years younger than most of the mums in my area I did NOT find friends in "mommy groups" or "play" dates... because in general I was looked down upon by the other moms. So I had friends from elsewhere. Sometimes they had kids, sometimes they didn't. But yeah... the whole purpose of "play" dates at your baby's age is for the parents, not for your daughter.
Your H, btw, may feel the same way. SAHDs tend to get either ostracized or *fawned* over by SAHMs. Both of which are uncomfortable.
Social butterflys, btw, seem to be born that way. My son had almost 0 interaction with other kids his age until 3 when he went to preschool, but he has ALWAYS been Mr. Social. Adults, older kids, kids his age, wee ones. Doesn't matter. He's just extroverted. <laughing> Since I'm NOT, it's been interesting to watch.