Many years ago I stood. Today I don't see the point. I have a stool which puts me pretty high up plus I'm 6'3" so I do get a good sight line from the floor. At this age, my knees wouldn't let me stand for very long. I do go out into the audience for a few stand up songs.

Joe
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PSR S950, PSR S900, Roland RD 700, Yamaha C3 6'Grand, Sennheiser E 935 mic, several recording mics including a Neuman U 87, Bose L1 Compact, Roland VS 2480 24 Track Recorder
Joe Ayala