Forty-two years ago, moviegoers watched John Travolta strut down a Brooklyn sidewalk — and into movie history — to the tune of “Staying Alive.” The disco blockbuster Saturday Night Fever premiered in theaters on Dec. 12, 1977 and that now-iconic opening sequence immediately got the audience in a dancing mood. But if the film’s producer, Robert Stigwood, had had his way, Travolta wouldn’t have been walking in time to that Bee Gees anthem. Instead, Stigwood’s plan was to save “Staying Alive” fo...