Depending on your home, it is often easy to create strong social ties with your neighbours or within your neighbourhood. Especially if you have kids.

Then the anecdote would be different. Definitely post-hoc since there's also plenty of workplaces you never end up with friends from. I am reasonably outgoing and have kept only a handful of friends from various past jobs. Mostly one group is still mostly friends (but we co-founded together so perhaps an unusual group).