Your first obligation is to provide safe accommodations for your guests, the majority of whom are probably nonsmokers. Just as you would not serve bad food, you should not allow polluted air. This is lynch-mob thinking. Furthermore, tobacco use is already limited by custom in churches, funeral homes, around newborns, and by regulation in many areas. Our society accepts the idea of providing special facilities for the handicapped.
Freedom of choice is no longer the best choice when that choice endangers others.
Everyone accepts as good and proper the limits of many freedoms. That is why we have speed limits and prohibitions on spitting in public. If this information is of use to you, please consider making a tax-deductible contribution to GASP of Colorado.