Just enough so that you don't complain when our hosts are kind enough to share with us what's important to their culture. No matter what excuses you come up with, it's rude.

[He took down half his drink in one go with those words, firmly believing in what he was saying. Even if he had some complaints about the local food, there were concepts such as 'self control' and 'decorum' that still needed to be followed....and it was unbelievably rude to turn down a dish without trying at least a bite of it, to give it a chance.]