Editor,—In 1998 a California state smokefree workplace law requiring that bars be smoke free went into effect.1 2Both before passage of this law and shortly after it went into effect, the tobacco industry and its allies predicted that it would hurt the bar business. To test the hypothesis that smoke free bar legislation harms the bar business, we obtained total revenues from eating and drinking establishments licenced to serve all forms of alcohol (“bar revenues”) from the tax authorities in California (fig 1). We conducted an analysis of these …