Hi,the only thing that we have done in the past that remotely comes close to what you are doing is this. Last summer we had a special showing of "Iron Giant" in which we advertised that 20% of the ticket sales would be donated to the Big Brothers/Big Sisters orginization in our area. It was a great success and it felt good to give to the comunity.Yes we had some retailers who helped out. I think if your cause is a good one you find some retailers who would be willing to help. Just make sure that they get the credit that they deserve, they need the good strokes for there business as well.