Share 'How to represent local non-profits at shows?'

Hi all, I joined this site because I thought the intention of the group was to be able to showcase local organizations at Brett Dennen's concerts. However, I can't find any information on the site as to how to go about doing this. I am seeing Brett this Friday at a venue in Northern Virginia, an area in which I am part of a local environmental sustainability organization. I would like to be pa...