FILE - In this April 18, 2015 file photo, young partygoers listen to music and smoke marijuana during the annual 4/20 marijuana festival, in Denver's downtown Civic Center Park. Saying that weed ... more 
FILE - In this April 18, 2015 file photo, young partygoers listen to music and smoke marijuana during the annual 4/20 marijuana festival, in Denver's downtown Civic Center Park. Saying that weed tourists have nowhere to legally use the pot they're buying, marijuana activists in Denver have launched a ballot initative that would ask voters whether businesses open only to people 21 and older should be permitted to allow pot use. (AP Photo/Brennan Linsley, File) less 
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Associated Press | Photo By Brennan Linsley, File
Fri, Jul 3, 2015 12:30 PM EDT