Ask HN: What to do on weekends in the Bay Area

I am a 17 year old high school student interning at a web startup this summer. I am from the East Coast, so I am not totally familiar with SF yet. My goal this summer is to meet developers and learn. I am unsure what to do on the weekends. I have searched meetup.com, but nothing has caught my attention yet. I would really like to attend a meetup or hackathon just to meet others and learn. Thanks.