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The Colorado Cannabis Convention, sprawled out over 200,000 square feet in the Colorado Convention Center and boasted as the largest Cannabis Convention in the country, was held April 2-3, 2010 in Denver, Colorado..The convention attracted the curious,  medical marijuana dispensaries, vendors, featured musical acts and prize give-aways such as bongs, cash and t-shirts..Model, Julia Leite, hired to help hock wears holds a t-shirt featuring a familiar sounding political slogan - with a slight twist for the convention crowd - it reads: 'Yes We Cannabis'. The shirts, sold for $10, were a popular item in Denver.