Hackernews, Medium and Slack groups related to what you like are great ways to get to know people in SF that are into tech/startups. Anyone has any other sugges

Hackernews, Medium and Slack groups related to what you like are great ways to get to know people in SF that are into tech/startups. Anyone has any other suggestion as to where to meet people that built something interesting? I tried tech/startup meet ups and Startup Grind but they sucked. I had more luck with unrelated events.