- free ▁work p laces ▁on ▁ 1 ▁July ▁ 2 0 0 7 . ▁Of ▁the ▁ 2 , 7 0 8 ▁responses ▁to ▁the ▁survey , ▁ 5 8 % ▁of ▁license es ▁said ▁they ▁had ▁seen ▁sm ok ers ▁visit ing ▁less ▁regularly , ▁while ▁ 7 3 % ▁had ▁seen ▁their ▁sm oking ▁customers ▁sp ending ▁less ▁time ▁at ▁the ▁pub . ▁ ▁United ▁States ▁ ▁In ▁the ▁US , ▁sm ok ers ▁and ▁hospital ity ▁business es ▁initially ▁argued ▁that ▁business es ▁would ▁suffer ▁from ▁no - sm oking ▁laws . ▁However , ▁a ▁ 2 0 0 6 ▁review ▁by ▁the ▁U . S . ▁Sur geon ▁General ▁found ▁that ▁sm oking ▁restrictions ▁were ▁unlikely ▁to ▁harm ▁business es ▁in ▁practice , ▁and ▁that ▁many ▁restaur ants ▁and ▁bars ▁might ▁see ▁increased ▁business . ▁ ▁In ▁ 2 0 0 3 , ▁New ▁York ▁City ▁am ended ▁its ▁smoke - free ▁law ▁to ▁include ▁virt ually ▁ ▁all ▁restaur ants ▁and ▁bars , ▁including ▁those ▁in ▁private ▁clubs , ▁making ▁it , ▁along ▁with ▁the ▁California ▁smoke - free ▁law , ▁one ▁of ▁the ▁t ough est ▁in ▁the ▁United ▁States . ▁The ▁city ' s ▁Department ▁of ▁Health ▁found ▁in ▁a ▁ 2 0 0 4 ▁study ▁that ▁air ▁poll ution ▁levels ▁had ▁decre ased ▁six fold ▁in ▁bars ▁and ▁restaur ants ▁after ▁the ▁restrictions ▁went ▁into ▁effect , ▁and ▁that ▁New ▁York ers ▁had ▁reported ▁less ▁second - hand ▁smoke ▁in ▁the ▁work place .