Mistake Bucharest for Budapest.
Never ask a Romanian if he lives in Budapest. That’s the capital sin, the perfect way to end a potentially interesting conversation. Yes, Budapest is a capital city, and there’s a big chance you’ll nail it with this guess — but only if you’re speaking to a Hungarian! We’re so tired of hearing, “Good evening, Budapest!” every time an international act has a concert in Bucharest. Metallica did it, Lenny Kravitz did it. And many others. But they had bodyguards.
You, on the other hand, will be alone in front of an outburst of anger.