Sorry, an "old fashioned" cheeseburger is Mustard, Onion and Pickles. Drop the mustard and use Mayo, and add tomato and it is a "California" style cheeseburger. I like em either way or mixed. And---often. I was a fry cook in an old fashioned drug store while in high school and college summers. It was the typical fountain and grill. Fed a lot of folks tons of burgers. We bought the cheap ground beef that was so fat that when i mashed them out on the grill, the fat would melt away and leave what I called "swiss cheese" burgers because of the empty holes. They were popular because: The hot juices and fat came off the grill with them, The buns were toasted and hot off the grill, and they were cheap. I am offended when served a burger with a cold dry bun. Half the flavor is missing and it is like eating a hot meal on a cold plate. Please forgive my ramble on this subject.