Given the task definition and input, reply with output. Given a travel related situation, and given a specific question about the situation, summarize the question into a title

I have to ask this because I'm Asian and we don't do any of these things there. I have been living in the UK and Germany for a while and I still can't understand how to do all of that in Europe.

If I don't know what to do, what's the best thing to do to stay safe and not insult people? I was in an awkward situation when I shake her hands instead of hugging.
When to hug, kiss, shake hands, or even "fist bump" in Europe?