Even though I live in the fifth most round country in the world, I immediately guessed it was about skin color. I think lack of tipping and prejudice often come together. I observe the same thing here. Waiters with eastern accent get rude treatment.
https://gciruelos.com/what-is-the-roundest-country.html
But not sure this is what GP was referring to
Quick search suggests they might mean Poland.
https://worldpopulationreview.com/country-rankings/most-obes...