Parking lot guy at Cal Expo: Sorry, cash only.
Me: Oh, um, I don't think I have cash.
Guy: You can go out the first exit and find an ATM. Come back, have fun.
Me: Oh, just a minute, I have quarters.
Guy: You can't pay in quarters.
Me: What!? Sure I can. This is legal tender.
Guy: No. I'm not gonna take your quarters.
Me: Yes you are. I'm going to pay ten dollars in quarters, and then I'm going to go park.
Guy: Sir, there are people behind you in line. I'm not going to make them wait while you count out ten dollars in quarters. Go to an ATM, come back, have fun.
Me: You're spending more time arguing with me than it would have taken to count the quarters.
Guy: I'm not taking the quarters.
Me: Yes you are. (And I take my keys out and set them on the passenger seat.) You go ahead and contact your manager, the cops, tow company, whatever you have to do to move my car. I'll wait here. Or you can just take my fucking quarters.
Guy: ... Give me the quarters.
It took about a minute to count ten piles of four quarters each. He handed me my parking pass and said again, less cheerfully, "Have fun."