Where do I start meeting people? Seek out networking events online?

There aren't really "networking events". It's a community of like-minded people that aren't particularly eager to add more people to the community that aren't also like-minded.

That aside, they can be fairly inclusive.

I got involved in the community in 2002. I was a typical dot-com nerd. I'd been doing some amateur rocketry events in the black rock desert and had heard about Burning Man. Eventually, I decided I had to go. Got introduced to a group of people that had a camp, they discovered I was terribly useful (I could weld, machine, fix electronics, repair generators, build things, etc), and the rest was history.

I went, met a tremendous number of people, cultivated lots of friendships and from there became privy to all the other inter-related things happening in the bay area, including the kinds of parties described above. The debauchery I've had the opportunity to participate in is quite extensive.

Be useful, be nice, be non-judgmental, go meet people, get involved, do stuff, become part of the community and you'll enjoy similar opportunities.