My dogs are always crated...but if they weren't...
I suspect Hondo would have sat on the driver's seat and wouldn't have budged. He would have given the guy the "Hondo Stink Eye" and the attendant would have carefully shut the door.
Lonestar would have leaped from the driver's seat onto the attendant's head, down his back, bounced off the wall of the car wash onto the hood of the vehicle, ran across the entire vehicle bounding off the rear, raced around the entire building once or twice then back up the attendant's back, over his head and back onto the driver's seat...before the attendant could have even straighten back up.
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA