If you want people to go out and socialise in person there need to be things for people to actually do that are accessible, convenient, and free. That means youth centres and funded adult education. Some places have societies but if you don't already share that niche interest there's little reason to join. Colleagues are generally scattered so you won't see the same people at work and around town to get casually introduced like back in the 1950s. They're all commuting 10 miles.