I met a lot of acquaintances playing Tekken, so I can absolutely believe in the idea that a game would bring people together, even though Pokemon Go is not my thing at all.
I've also similarly made many friends through playing Tekken offline. I believe the local aspect of fighting games (as opposed to most online games nowadays), and the depth of its mechanics is very conducive to making a wide variety of close friends (old and young). I recommend people check out fighting games or games that require person to person contact to make more friends.
