Who we can build social capital with

By "we" I'm referring to people with Humanist values and such.
And the general answer is that we should build social capital with people to the degree that they are aligned with our means and ends.
More specific ideas of who to connect with:
* CCVO, and their members
* clubs at university, groups on meetup dot com that are aligned with us
* community centers
* citizens who are talk about local politics
* people from various social divisions