Here's FELLOW. They've become famous for creating simple brewing equipment to assist thirdwave coffee brewers - my favorite being their pour-over kettle with a weighted handle to make a consistent pour more easily attainable. Walking into Fellow, you can select one of five beans from different roasteries around the world, and they take you back to the 'playground' to teach you how to brew a pourover yourself - from their own equipment. The barista was surprised I already knew a bit about brewing, but that made our conversation all the more fun. Definitely an incredibly fun stop on my journey through ten coffee shops in San Francisco.
My second time here: