Workplace smoking laws apply to all enclosed indoor workplaces (more than 50% covered and surrounded by physical barriers). Exceptions include stand-alone bars.
Smoking is prohibited throughout the workplace. Florida laws don't address the specific areas of a workplace where smoking may be permitted. Remember that some workplaces might already be subject to Florida or local laws that regulate smoking in public or smoking in or around certain kinds of businesses.
In Florida, a customer's smoking room in an airport in-transit lounge may not be designated in any common area. It also must be enclosed by physical barriers that are impenetrable by secondhand tobacco smoke, exhaust tobacco smoke directly to the outside, and comply with the signage requirements.
Florida doesn't specifically require employers to provide workplace accommodations for nonsmoker employees.
Florida employers must develop and enforce a policy prohibiting smoking in the workplace. Employers may post "no smoking" signs to increase awareness.
Florida does not have a law protecting smokers from discrimination, nor does it have a law protecting employees from discipline or discharge based on their off-duty conduct generally.
If you want to go right to the source and look up Florida law on workplace smoking laws -- or if you're writing a letter to your employer or employee and want to cite the applicable law -- the relevant statute(s) can be found at Fla. Stat. Ann. Sections 386.201 to 386.209. Workplace smoking information is also available in Nolo's books Your Rights in the Workplace, by Barbara Repa (Nolo) and The Employer's Legal Handbook, by Fred Steingold (Nolo).