Because being a social outcast isn't an achievement, it's a Philosophy of its own.
Don't be a Don't Be Late, for goodness' sake.
Don't talk about your Politics at dinner parties.
Don't Be That Guy who overeats.
Learn to Small Talk.
Don't Be Lazycoworker on Mondays.
Learn to respect the Locals.
Don't Be A Tourist and take a selfie in front of every Eiffel Tower.