anachrokate

This was written by a state communist, so you can imagine what "structure" she advocated, and the anarchists immediately replied with The Tyranny of Tyranny

http://www.libcom.org/library/tyranny-of-tyranny-cathy-levin...

Wait. He shot cops in the head? Awesome!

There's a host of radical spaces in the bay beyond the ones Moxie mentioned. But hackerspaces like Noisebridge and Sudoroom have a large quantity of explicit and involved anarchists as core members, as well as a long tradition of using anarchist organizing models and even on occasion referring to themselves as anarchist projects.