Doobba, the first legal cannabis delivery company to be licensed by Denver, voluntarily surrendered its state of Colorado, city of Denver and Aurora licenses on Monday, ending operations after attempting to pioneer social equity in the new cannabis delivery market, owner Ari Cohen and Colorado's Marijuana Enforcement and Taxation Division confirmed to Denver Business … [Read more...] about Denver’s first legal cannabis delivery company shutting down. There have been people doing this for decades. Stop trying to change everything all of the time.