In the NW, a shop usually put's the event on. They get the word out and people show up. It's nice to show up and hit the rollers and no work really goes into it. Usually there is a donation of some sort and we bring drinks or I've seen shops dealer tags for numbers, just hang it from the mirror. i don't know if some guys would want polish on thier windows. I wouldn't care but you know there's "that guy" who wouldn't want it on his truck.