Community foundations, neighborhoods with neighbors who care about each other, recreational sports leagues, activity clubs, temples synagogues and churches. There are many, but they’re often not behind the piece of magic glass in our hands.
It's not about "doing good", it's about "preventing harm", which FB has failed at doing at a staggering scale.
Most physical ones I guess?
Many online forums are kinda social networks.
social networks? sure. Social Media platforms? no.