Though she concedes there may be other factors.     GO=>

In the home of Heineken and Grolsh, alcohol culture gets some competition. It is interesting to be in a place where there is a developed social culture surrounding a drug besides alcohol. Pot smoking (like prostitution) is a different thing when it's legal and in the open. Less dark and edgy, less bad. Coffeeshops are quieter than bars, somewhat less social, relatively boring--no acid tests or freakout scenes. A lot of them are internet cafes.