You can smoke, just not in certain public buildings. It's an air quality standard.
Smoking bans would survive an equal protection challenge because they are rationally related to a legitimate state interest.
but feel free to put your money where your mouth is. Hire a lawyer and challenge a smoking ban on equal protection grounds.
I like how you believe I am the one deciding how equal protection works to suit my beliefs. I'm not the one who decided this, dude. The Supreme Court did.