Just throwing this out there as it might not be desirable or possible, but, do you have access to a dog? I've noticed that people who own a dog and walk it, or even walk other people's dogs, have crazy mad social contact, daily!
It seems to be an intensely social thing just to take a dog for a walk in a place where other people also walk their dogs -- the dogs usually want to check each other out, and it brings the owners into a conversation usually, too. In my local park I don't know how a person with a dog makes any actual progress around the park -- I see them stop and talk with every other dog walker/owner.
If you want to get exposed to being social and encountering lots of people, dogs seem like a golden key to all that. It's one reason why I don't want one even though I like them, lol.