Methodology
Maybe you want a place that smokes the most cigarettes or drinks the most alcohol per adult each year. And if throwing away your money (or taking someone else's) sounds appealing, go for net gambling losses as a percentage of GDP. And all you drug users and abusers can see what percent of the adult population also partakes in amphetamine, cannabis, cocaine, ecstacy, or opioid use. Go ahead, have fun with it!
Bloomberg released the data earlier this year as part of their Best (and Worst) series. It has since been removed.