No point.
We've documented again and again that smoking bans hurt bars and restaurants, with or without bars.
The anti-smokers are always saying that the non-smoking population will make up for the smokers staying away.
Is there 15% of the population, at a conservative estimate, that doesn't smoke that doesn't go out NOW that WOULD go out because there is no more smoking in a business?
I don't have any scientific proof but I doubt it.