Smoking bans in bars are a temporary phenomenon
Smoking in bars will eventally come back. It's not like you're there for your health.
Banning smoking in bars is a little too much like prohibition in my opinion. Would it save more lives to ban smoking in bars or to ban alcohol in bars but allow smoking?
There's a lot of tax revenues to be had for localities that allow smoking bars, especially when nearby localities have outlawed them.
Whatever arguments that can be made for banning smoking (health care costs, saves lives, etc) would be stronger for banning alcohol. We tried that back in the 1920's and decided it wasn't worth it.