^^^Love it, Mike, thanks.
Think I've got to go with the car wash bit, though. Jeopardy bit is still pretty flawed, not as funny, and the only really big laugh is the last line.
I'm going to cut the zip code/Edina part, as most folks seem unfamiliar with that step in the gas-buying process--and the bit is too long, any way (Edina may be the "right" answer--it and Eden Prairie were the first to jump to my mind when I wrote the joke--but Yugo's suggestion of "Minnetonka" was perfect, imo). Receipt/rewards card/grade is enough set-up to build my exasperation before i get hit by car wash. Also cutting soda fountain/worn buttons stuff, and change all my answers to increasingly frustrated repetitions of "OK, fine, now turn the pump on, I'm freezing!"
Posted on FB to my friends, asking them to show up to this. All the eager, excited responses are from people who will be out of town that day.