I am not a fan of those types of groups. I was trying to help out the Symphmony Orchestra at their events. I had to pay to be a member, then one day I recieved a letter with 4 tickets that I would have to sell or purchase if I didn't sell them. I called them up and quit the organization because of this. I told them I was willing to take tickets, seat people, organize events but did not feel this tactic was fair (really underhanded) to take advantage of volunteers.