A t-shirt on sale inside a legal marijuana store in Denver, Colo. on what retailers have dubbed "Green Friday."(Photo: Trevor Hughes/USA TODAY)DENVER — Colorado’s legal marijuana stores reported brisk sales for what they dubbed “Green Friday,” the first year they could participate in Black Friday, the year’s biggest shopping day for more traditional retailers.”We’ve been busier than normal,” said Terry Hobbs, a manager at The Kind Room, one of at least a dozen marijuana shops along a section of South Broadway known informally as the Green Mile. “It’s been a fair amount of people in town visiting family.”Many stores are running holiday specials, but few have the deal available at the Grass Station, which offered a limited number of ounces of marijuana for $50 – at least $200 less than usual. Many smaller shop managers said they couldn’t afford to sell pot at such a steep discount. Still, customers were seeking bargains, said Cory Lasica, manager of the Green Depot.Marijuana products sit atop a Christmas stocking being made into a pre-packaged present at Denver's Green Depot marijuana store on what pot shop workers have dubbed "Green Friday."(Photo: Trevor Hughes/USA TODAY)“The phone’s been ringing off the hook all morning with people calling about Black Friday specials,” Lasica said. “It’s a whole different beast.”Like many stores, the Green Depot was offering up to 20% off many products, including marijuana-infused foods and concentrates. Lasica and his staff spent Friday morning stuffing Christmas stockings with marijuana, edibles and t-shirts for pre-packaged presents.A few blocks south at Sticky Buds, store worker Mitchell Burzynski said customers had been stopping by and calling to ask about discounts.”I’ve been feeling a buzz all morning,” Burzynski said of the store’s unusually busy morning.”This is where I’m doing all of my Christmas shopping,” said A.J. Swank of Denver, holding $60 + of Big Bud Blueberry from the Sticky Buds store. “All here today. All for me.”Colorado on Jan. 1 legalized recreational marijuana sales, although medical marijuana sales have been permitted for several years. While many stores sell both medical and recreational pot, shop managers said the two tend to draw different customers. While many locals have the medical cards, allowing them to buy cheaper tax-free marijuana, tourists and visitors are among the best customers for recreational sales.Last month, recreational marijuana sales generated more than $6 million in tax revenue for the state.