In all of OCF's screening events, even the ones partnered with WalMart, we invite local politicos from the Major of LA to council people to come to the screenings. There is a simple reason. Th Mayor never does anything with out media on his tail.... usually invited but often not. It makes the evening news.
We have done a lot of these, and learned a lot from our early mistakes. The most important thing to do when you consider doing a screening, is to do it in a place where lots of people already are coming. (Like at the front door of a Wal-Mart where 30,000 people a day walk through it) This gets rid if the issue of getting people to come to your event, you just need "people wranglers" to talk to the people about the need for the screening, and that it's FREE and painless and only takes a couple of minutes.
If you would like some help working this out, please give me a call and hook up with Susan Lauria, who is coordinating all our events.