I really like this idea. I've never organised a cinema before either but I have a contact at the Horniman and I'm happy to have a go at pitching the idea to them, and other venues. I'm not part of a community group but happy to join one. I see there are a few community cinemas already:

http://neighbourhoodcinema.org.uk/find-c...field_lat=

But it appears they are fairly far apart and with infrequent screenings so maybe still room for a new one.

Does anyone fancy meeting for coffee to discuss it?