Why should government mandate how a private business is operated?
Government already has regulations for private businesses, such as codes for electrical wiring, requiring fire exits, keeping foods at safe holding temperatures, maximum occupant loads, etc. These regulations are for the health and safety of the building occupants and the community. Especially with the solid science about the health effects of secondhand smoke, it is indeed appropriate for government to establish a regulation to prevent this totally unnecessary pollution of the air with a known cause of cancer and heart disease.
