When we went to Burger King as a family, we always went to the same one. It was a great location, clean, unchanging and of course brown. The one day they started tearing up a section of the restaurant to install a salad bar. I had zero interest in it, but when it was completed and upon return trips my family would hit this new salad bar with gusto.
Maybe people hit it with too much gusto because BK franchisees complained a lot that the salad bar was pricey to maintain and had low profit margins. Eventually the salad bars would be shut down replaced with pre-made salads which my family almost never ordered. It took them at least a year to get rid of the now abandoned salad bar at our Burger King and when they finally got rid of it they replaced it with nothing. So it just left this giant empty space in the restaurant.
Here is an ad from the mid 1980s featuring model Elle MacPherson, who really loves here BK Salad experience.