It is truly amazing to see all the closet Nanny Staters on this site when some Nanny State Nazi passes a law that benefits them personally. They are willing to rob other people of their Liberty when it benefits them personally in some way.
Prohibiting smoking may make a non smoker happy bit it robs the liberty of those who smoke.
Frankly, even though I detest the smell of cigarette smoke, I can't imagine a New Orleans Jazz Club without the atmosphere of wafting clouds of second hand smoke.
My guess is that most Jazz Club owners will not enforce this law. If the police want to come in and arrest smokers, then they can do do at their own risk. I suspect that the police will not enforce it either.
This is a law designed to make politicians feel good about themselves. Kinda like Obamacare.
I never smoke. I tolerate those who do because I like Freedom. If it bothers me, I would leave the premises. There seem to be a lot of Freepers who like statist answers to smoking. Freedom should be preeminent.