Today via Facebook I was able to set up lunch with a few people I haven't seen for months (one of them, years) - all effortlessly, all without having to track down contact information that in the old world would have been woefully out of date. All instantly.
Next week I'm going to be showing up to a random improv thing along with hundreds of random strangers whom I've never met before. I will likely chat with a lot of them, and maybe make a new friend or two. Try that before the internet.
Heck, on one of my subscribed subreddits someone has taken the liberty of setting up a weekly board-games-and-meetups night for community members to hang out. These people have never met prior to this, and save for a common interest in a website would never have met.