Even for someone who dislikes smoke in any type of establishment, I see this as a blatant violation of the rights of business owners.  Any legislation that allows the state to restrict a voluntary action within the confines of a private establishment, opens the doors for further encroachments on our liberty.  

Health concerns are completely irrelevant to this issue.  Patrons of bars and restaurants are not obligated to enter any of these establishments, and they have no right to impose their will on the owners or the other patrons.  No one has a right to a smoke-free restaurant or bar as a consumer.  That would place an illegitimate obligation on business owners to provide such a service.  Legitimate rights never impose positive obligations (requiring a smoke-free establishment) on anyone; instead they impose a negative obligation (ex. one cannot deprive another of free speech).  

An owner absolutely has the right to ban smoking within their establishment, which has been done successfully in many cases.  In doing so, the owner imposes no positive obligation on anyone else.  Business owners are offering us something, not forcing anything on us.  We can choose to do business with them or not; and our health decisions are much better left in our own hands.