Wow! WOW! You are the luckiest person on earth, being close to Kopps. Us and the kids went there in 70's and they would split the burger. They had a Kopps on Capital Drive, back in the day. Their Custard was the best too. 15 years ago, my wife and revisited our growing up old neighborhood, Whitefish Bay, and there was a Kopps. There used to be a famous drive in burger place in Kenosha.
I think it was 10 years ago we made another trip to Kopps, near South Ridge Mall. It was still good with fries and a MALT, sitting in the car parking lot. Happy you mentioned it as we need to make another day trip. lol