International World Cup fans visiting the US have been frustrated by tipping expectations unfamiliar in their home countries — and restaurants in host cities are responding by automatically adding 20% gratuity to bills when visitors leave inadequate tips. This highlights a genuine cultural clash: US tipping norms are among the world's highest, and many visitors consider the practice confusing and economically burdensome on top of already expensive World Cup travel. The phenomenon has been documented across multiple host cities and is driving a visible conversation about American service industry economics.