Customers gather around a counter to take advantage of special deals celebrating the 4/20 holiday at ShowGrow, a medical marijuana dispensary in downtown Los Angeles on Thursday, April 20, 2017. From Capitol Hill in Washington, D.C., to Hippie Hill in San Francisco's Golden Gate Park, marijuana enthusiasts observed their 4/20 holiday Thursday with public smoke-outs, parties and, yes, great deals on weed. (AP Photo/Richard Vogel)