LOL, a better question would be what cancerts haven't I been stoned at. Some of the better ones are:

Grateful Dead-Saw the Dead over 30 times, all stoned, shroomin, or tripping. The best was a concert on Chinese New Year. We were all shrooming on about 4 grams each and during the Drumz part of the show they had a a "parade" with a huge dragon, lion dancers, etc that moved through the crowd. Then this giant dragon skeleton thing flew up from the back of the auditorium to the top of the place. Fucking insane while shroomin.

Jerry Garcia Band- 12 concerts, all stoned shroomin, or tripping.

Pink Floyd-13th row center with an oz of my buddies homegrown dank. Best concert ever.

Roger Waters
Allman Brothers
Jethro Tull
Heart
Santana
Jefferson Airplane