In 1982, writer Chuck Ross transcribed the screenplay of Casablanca. He changed the title to Everybody Comes to Rick’s, and he changed the piano player’s name to Dooley Wilson. Then he submitted it to 217 Hollywood agencies.
Only 85 read it. Of those, 38 rejected it outright, 33 recognized it (but only eight specifically as Casablanca), and only three declared it commercially viable.
One suggested turning it into a novel.
See also The Steps Experiment.