I came across this a little while back. It seems like a cool thing for people like me to get introduced and started in welding and crap like that. Anyways, the deal is that you sign up for a class (~$30 or so) and the class will teach you the basics of whatever class you're in. And then you can get a monthly pass for $100 and use the equipment. They're still in the process of finalizing the one in LA.
TechShop is the SF Bay Area's Only Open-Access Public Workshop -- Class Catalog
TechShop is the SF Bay Area's Only Open-Access Public Workshop -- Class Catalog