Your answer would be, Snack food vendors were for the measure while beer vendors were against it. Marijuana; and beers are considered substitutes as they both affect the central nervous system as depressants; similarly affecting to the body; and therefore, be viewed as competitors in the market space; and reducing beer sales; as consumers pursue marijuana. However, snack foods are considered complementary as marijuana use has been shown to enhance sensory inputs; and produce "the munchies" resulting in the user purchasing snack foods thus; elevating snack food sales.
Hope that helps!!!! : )
