A March 2017 research report by the Cannabiz Consumer Group similarly indicates that cannabis is cutting in on beer’s popularity. Researchers reported that 27 percent drinkers surveyed said that they had either substituted cannabis for beer, or that they would do so in the future if retail weed sales become legal. The company estimated that beer sales could decline by as much as $2 billion if cannabis was legal nationwide.

http://www.salon.com/2017/06/21/is-big-alcohol-taking-a-hit-from-legal-weed_partner/