From The Truth About Guns:

KING5 in Seattle reported on a pot shop that’s hired armed security following a pair of armed robberies in recent months. They must have found the only pot shop in America that didn’t already have a guard with a gun. Then again, many pot shops in Washington State advertise themselves as “no guns” locations for customers. They also (obviously) have recreational pharmaceuticals and, thanks to banking regulations, deal exclusively in cash, making them ideal targets for violent criminals.