"Sin City" is an outlandishly creative flick.
You should smoke while watching it, even if you don't usually smoke.
A couple of strong margaritas beforehand won't hurt either.
That is becoming increasingly impossible or inadvisable also (along with smoking).
If the movie is shown outdoors, great. But if not, will anyone be able to see the screen by the end?
Why? You sound like that anti-smoking nazis, but in the opposite direction.