For your last bit, yeah we do. Old friends catch up from time to time, you meet people through shared interests and going out to find people with them, or you go to a bar and chat with strangers over drinks because it feels good to do that. At least I do all three as an extrovert in her 30s. I had to learn to do all of these things when I was younger. I spent months alone not talking to people early in college and it was psychosocially awful. Internet forums weren’t an acceptable substitute.