He's pissed, because an adult, sitting in a bar, who wants to smoke, and the bar-owner, who wants that adult's business and who doesn't mind smoking can go ahead, like adults, and... smoke.
He wants to prevent those two adults from transacting business in that fashion.
He doesn't really need to interfere with that buisness; it is just a bar, after all, not a Secretary of State's office, or a Circuit Court, or a hospital (all of which ban smoking). No, it's just a bar, where people have routinely gone to relax, drink, tell jokes, watch the game and, sometimes, have a smoke.
Now, thanks to Democrats in Lansing, there's a law that prevents it. Hallelujah for more laws. What would we do without legislators looking after such important issues?