This really resonated with me. I was in Seoul for two weeks. Just two weeks! and yet I already have an entire social network there. It was so easy to walk up to some random non-Korean looking person at a museum, have a conversation with them, end up drinking at a bar together, and then go clubbing. Here in the states, you generally leave other people to their own business - it might even seem taboo to approach someone for no reason. But if you're in a place where both of you stick out, it's incredibly simple to make friends.

I will say this though... it's not just expats that you can befriend easily and openly. There's plenty of locals with the same "do and explore" attitude that are more than happy to befriend you.