A percentage of RVers still smoke... Cigarettes or cigars.... In some cases its been a motivation to buy an RV as smoking is now forbidden in almost every hotel room. Of course you don't want that smell in your RV and certainly if you expect to ever sell it, price goes down considerably if it has been tainted with tobacco smoke. If you ask someone these days If they smoke and they say yes they usually follow it with "yes but I am trying to quit"...