Leon Phat, perennial cyber candidate for SF supervisor leads a walking tour of San Francisco social movement history, beginning with a very short performance art interactive exercise involving the "Two Cows" introduction to different socio-economic systems.

Here's a link to a Two Cows economic systems tutorial: https://en.wikipedia.org/wiki/You_have_two_cows

The punchline of the walking tour is, "All these economic 'isms' fail to ask where the cows are, and who owns that location."

The walk is free. The cows are somewhat gratutitious, though humorous and educational. The outcome is hopeful (that your humanity will be milked for all its worth, and you'll end the walk a radical advocate of abolishing monopoly).