I land in Narita Airport, Japan, pull two thousand Yen out of the ATM, and get on the train for Tokyo. From memory I walk down familiar streets until I get to the New Zealand Embassy in northern Shibuya, where my friend Elliot lives. I haven't seen him in almost two years, and have only emailed a few times since then, but it's as if I never left. We joke around, walk to dinner, and make plans for the weekend.
The next day I pop my Japanese SIM card into my phone and call my friend Toby to let him know that I'm around. He tells me about a party he's throwing in Yoyogi park, so a couple other friends and I join him.
Nothing about these individual scenes is particularly noteworthy. That's the point. In various places around the world I have enough good friends that I can have a pretty normal life there while visiting.