Trumpeter Arthur Holden of the Musicians Action Group was playing “Down by the Riverside” and other peace anthems with his troupe as they marched on Market.

“I’m sick to my stomach at what’s going on in this country,” he said. “I’m waiting for the apocalypse. The trumpet helps.”

Bruce Yurgil, a cartoonist from San Rafael, was trying to unload 80 homemade T-shirts showing former President George W. Bush’s brain spilling from his head. The T-shirts were marked down half-price, to $10.

“It’s no fun being a cartoonist these days,” he said. “The only person I can make fun of anymore is Rush Limbaugh.”