Nice place, good vibe, ok food, ok drink .... but ...

Nice place, good vibe, ok food, ok drink .... but when an Italian friend raised his hand to a bald waiter, he was harassed out loud and for everyone to hear in good tone that this gesture is rude, my friend asked for a break , was upset and the waiter continued to harass. It was my first time in this bar and I don't like to complain, but I think it would be better for him to explain the culture that is different and my friend is a good guy. Anyway my friend failed, I agree with the waiter, but it was unnecessary and as rude as raising a hand.