I've been following this topic for days and just have to get in my 2 cents worth.
First, this is the US, not Canada, Ireland, Germany, etc, and we Americans are concerned about the behavior of OUR govt. In the past we've seen an increasing inclination of Uncle Sam to surrepticiously inculcate himself into the private lives of citizens and this is frightening. And the smoking ban in public places (but "private" businesses) is just such an example. Think about this - 50 years ago SS numbers were voluntary. People got one when they got their 1st job so the govt could keep track of earnings and return it to citizens upon retirement in the form of Social Security. If you didn't work you didn't need a number. Today this number is required and issued to babies at birth. Children can't attend public school without it. And it's on everyone's military ID, drivers license, pilots license, insurance policies, medical records, tax returns and who knows what else. Our lives are linked to this number and the govt has easy access to any info connected to it.
Now let's fast forward to 2050 when we all have microchips implanted in our arms at birth with our identification on it. We can be scanned for medical records, driving records, criminal records, whereabouts on any given day and time (GPS included in the chip). This will initially come about because young families will be convinced that this chip will protect their children in case of abduction. And once this voluntary procedure becomes the norm it's use will expand until it's the standard, no longer a choice but a legal requirement. I know this seems fanciful but consider this, I don't want to have a SS number but nobody cares.
As far as smoking in bars, etc goes, (public places but "private" businesses) why not let the market place set the rules. If people want smokeless establishments and there's one non-smoking bar in town, it'll get all the businesses. Soon the other business owners will follow suit and go the smokless route. And everybody can choose whether he wants to suffer second hand smoke or breathe clean air - it beats the govt choosing for us.
BTW, if the health risk of second hand smoke is unacceptable to most Americans then our govt owes it to us to make smoking illegal!