This article is from the Libertarian FAQ, by Joe Dehn email@example.com, Robert Bickford rab.AT.daft.com, Mike Huben firstname.lastname@example.org and Advocates for Self-Government http://www.self-gov.org/ with numerous contributions by others.
"In a libertarian society, the smoking policy would be set by the bar
or restaurant owner. Customers would patronize the establishments
that had the policy they preferred, much as they do today. For
example, I avoid places that are smoke-filled, and opt for restaurants
that are smoke-free or have separate accommodations for smokers and
non-smokers. As a customer, I have no right to dictate smoking policy
any more than I have a right to dictate the color schemes for clothing
manufacturers. However, I let both know my preferences by voting with
my dollars to do business with them or their competitors."  -- Mary
 "The Liberator OnLine," http://www.self-gov.org/liberator.