Ask HN: Does anybody wants to show me what is going on in San Francisco?

Hi guys, I am a Software-Developer from Germany. I am am a skilled Python programmer, have a lot of experience with web development and I am involved in various open source projects. This week I am in San Francisco and I know that a lot of cool software projects are based, here. So does anybody wants to show me his startup or just something cool he is working on or just want to discuss interesting stuff while having a beer? ;)