PG&E claims that the pop-up cafes will appear periodically around San Francisco all summer thanks to their Let's-Green-This-City ad campaign, an attempt to distract us from how unsustainable and grey the vast majority of their energy is. (How sustainable was the energy for the construction tools? The food equipment? The vehicles to transport the whole shebang? Unless it was powered by a bunch of hamster wheels, not very, we bet.) You can subscribe to the green-our-city PR here.

Alas, while very nice and artsy, this reclaimed-furniture thing doesn't directly translate into any kind of sustainable solution -- what, are we all supposed to trek down to the dump next time we need a credenza? -- but, hey, free mugs!