Supporters rally for Denver flavored tobacco ban but opponents say it won't help Colorado Advocates: Act as Denver Flavor Ban Takes Effect Will you vote to repeal a ban on flavored tobacco in Denver?, Referendum 310 is on your ballot this year. If a majority of voters vote yes the city will continue to ban flavored tobacco products. If Colorado is set to ban vaping where smoking is already prohibited, following more than a dozen other states : r Denver Denver City Council passes flavored tobacco ban