"Our results indicate that smoke-free laws do not affect restaurant revenue directly or as a share of private consumption even in a country known for its harsh climate. There is some evidence for a short-run effect on pub revenue as a share of private consumption, but there is no evidence of a short-run effect on the absolute level of pub revenue and no evidence for a long-run effect using either measure."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3249552/
"Our results indicate that smoke-free laws do not affect restaurant revenue directly or as a share of private consumption even in a country known for its harsh climate. There is some evidence for a short-run effect on pub revenue as a share of private consumption, but there is no evidence of a short-run effect on the absolute level of pub revenue and no evidence for a long-run effect using either measure."