This undated image, provided by the Colorado Symphony, shows the orchestra's musicians performing at Boettcher Concert Hall, in Denver. The Denver city attorney has given his nod to the Colorado Symphony’s changes to plans for marijuana-themed fundraising concerts. On May 14, 2014, the symphony said three events, billed as bring your own cannabis and scheduled to kick off later this month at a private Denver gallery, would be invitation-only. (AP Photo/Colorado Symphony)