A few times. Two were smaller, general admittance shows where I could just jump into the mosh/dance pit and not care. The third was a small but sit-down folk show, and I loved the group so much (Gillian Welch) that I really couldn't give a s*** that I was alone.
I wouldn't want to go to some stadium show alone, though. That sounds awful.
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"It's a magical world, Hobbes ol' buddy...let's go exploring!" - Calvin
http://img.imgcake.com/calvinfinalpngpy.png