I thought that was an excellent idea and then couldn't get it out of my mind. I came up with this ad:
Two people stand on a white background, like the "I'm a Mac" ads. One is wearing a black t-shirt with the red circle A; the other with a worker's cap and red flag.
Anarchist: Same bosses, left or right!
Leftist: Workers of the world, unite!
Voice over: Even when people fight on opposite ends of the political spectrum, they understand the importance of a good cup of coffee.
Anarchist: Coffee has integrity just like a man. And just as seldom.
Leftist: Communism is Soviet power plus strong coffee for the nation.
VO: That's why revolutionaries of all stripes pick anARCO coffee.
(The two figures are handed cups of coffee, look suspiciously at the other's, then drink, and are obviously delighted.)
VO: anARCO pays careful attention to each and every bean in the individualist fashion it deserves without sacrificing its personal freedom, then combines them in a variety of roasts and blends to satisfy even the dirtiest communal-minded hippies.
Anarchist: I prefer the Rothbard Roast! It's blacker than even the most hardened libertarian's heart.
Leftist: New Deal Dark wakes me up in the morning, so I'm ready for a day of fighting the bosses, and imposing state will on people who have no choice!
VO: So if you're a revolutionary, choose the revolutionary coffee. anARCO.
(Shot of can of anARCO. Voice over says quietly: Also available in decaffeinated centrist; sure to satisfy nobody at all.)
Hilarity ensued. Brian suggested Spooner flavored creams for the "shooshy-foophy crowd" (his term, I love it) and Haile Salaise dark Ethiopian Freedom Roast. I came up with Marx Mocha (which has no mocha in it, because it's a symbol of the decadence of the bourgeoisie), the Ayn Rand Special ("Coffee is Coffee"), and the French Revolution Roast.
Any others? We cracked ourselves up.