I think you misunderstood. The association is for the ban. The ban would drive moms & pops out of business. Big chains would benefit.
That is EXACTLY what is going on here. The restaurant associations are, for the most part, controlled by the chains. As a rule they can handle a downward turn in business because they know their competition can't withstand it.......in a short period of time the chains will be the only games left in town.
Smoker bans are government sanctioned monompoly deals for the chain restaurants.
This is how capitalism works. Survival of the fitest.