Generally, this is a well-written piece. I am no great fan of direct questions, so I don't like the opening, however. I think it would read better if you made them indirect:
If you dislike the smell of cigarette smoke in restaurants...
I'd rewrite this sentence too:
No more toxic fumes flowing in the restaurants, more customers would like to go to their places to have a drink.
Have a go and see if you can improve on it.
- For Teachers