I suppose if you take $10 as the price of a pack of cigarettes and $15/hr as the wage earned, then you could argue 2/3 of an hour of leisure time/personal life is lost per pack purchased/smoked.

The cigs were a much better price proposition before smoking was ostracised. Pennies on a dollar.

You should see the wonders of the smoke breaks some 'senior' people had in the first consulting firm I worked for. One cigarette here, one cigarette there... aaand that wraps it up for the day, here's hoping the interns did some actual work.

I think you can substitute time sink with lower life expectancy for tobacco.