Meetup.com helps. The website allows founders to create events that spark interest in the community. People who are new to their area or have lack of friends can look up their interest (be it kayaking, ping pong, movies, etc.) and find others to hang out with.

So it's not unusual to see a Meetup for the salsa community. Excluding Salsa Meetups outside of the bay area, there are currently Four organizations in the Northern Cali Bay Area. However, the one group that deserves attention is the one that is consistently active: The South Bay Salsa Meetup Group.