The Las Vegas Medical Marijuana Association hosted a media tour of three dispensaries on April 20 April 20th (420) is the unofficial national celebration of marijuana Reporters toured NuWu Cannabis, run by the Las Vegas Paiute Tribe and called the largest dispensary in the world They toured Acres Cannabis, which has developed the first fully legal marijuana farmers market in Nevada The tour ended at Exhale Nevada, which wants to market itself more to medical marijuana buyers