The Binders is an enormous group of writers, grouped into almost any category you could think of.
https://www.facebook.com/groups/1405711519717552/
Here's a general description:
READ ME! (most recently updated 1/11/17)
Welcome to The Binders! This is a community for women and gender non-conforming writers. The best way to familiarize yourself with how this community operates is to check the group on a daily basis. Active members of our community have found paid writing gigs, new jobs, literary agents, and other opportunities, by participating on a regular basis. If you're only here to promote your own work, this isn't the place for you.
And a link to LA Binders:
https://www.facebook.com/groups/labinders/
This is only the tip of the iceberg. Go explore...this group is full of events, topics, and potential friends and associates. =)