here here :

"In what country do you live? In Russia, for example, ventilation in restaurants is done very carefully and in compliance with the relevant norms.

I can ask you, who wrote this, you smoke, right?
My friend smoked for 10 years and thought the ventilation in restaurants was incredibly good. Until she stopped smoking and her odor has not returned. Now we sit in the non-smoking room in the furthest corner from the smoker, if there is a possibility. Because, in fact, this damn ventilation doesn’t work well enough. It doesn’t work, you understand. And you sit in any room and eat food with the taste of other people’s smoke.