Two years ago Madison, Wisconsin told restaurants to build special ventilation systems or else they're going to enact a smoking ban.
The city lied to the business owners. They enacted a smoking ban anyway, and guess what? The business owners just wasted thousands of dollars on smoke-free ventilation systems.
Besides, patios and decks won't do smokers any good when it's 10 below zero. This is Wisconsin, not Cancun.
If the patios and decks are nice enough that the antis might want to use them then soon enough they will be mandated non-smoking too.
Hey Eugene isn't exactly Cancun either. Those smokers are a hearty lot. They bundle up, go gather around the gas stove on the smoking deck, and have their fix. It works in Eugene, and it gets damn cold here too.