When they shot the first bridge scene, director John Badham kept secret from Donna Pescow the fact that when 'the guys "fell off" the bridge they actually landed on a platform a few feet below. Badham and the other actors didn't tell her about the platform because they wanted a genuine look of horror and anger on Annette's face when Tony, Double-J and Joey appeared to fall off. Therefore Donna's reaction to them falling, and her facial expressions turning from horror and shock to outright anger, were real, and her next line, "YOU FUCKERS!", was not scripted.
When Tony's dad hit him in the back of the head the third time during dinner, his retort of "Just watch the hair!" and then his complaint about being hit on the hair after he had worked on it for so long was John Travolta's own reaction and not scripted, but since it was so in character for Tony Manero to say, it was left in.
The film was rated R when it was released in late 1977. The studio was so eager to attract more young people to the film because they were buying the soundtrack album, that the film was cut by a few minutes and the shorter version was given a PG rating. The PG version was released in 1978. Both versions were released on VHS but only the R rated version was released on DVD.
According to the DVD commentary, John Travolta used two suits in the climax of the film, he had to switch suits between takes because one would become heavily soaked with sweat and had to be dried while he was wearing the other one for subsequent takes.
The white polyester suit worn by John Travolta sold at auction for $145,000 and purchased by movie critic Gene Siskel. Siskel often said that this was his favorite film and that he had watched it 17 times.
In the episode of VH1's Behind the Music (1997) about the movie, 'John Travolta' addressed the rumors that the below-the-waist shots of Tony in the opening title sequence were done by a body double. Travolta said that it was all him during the sequence except for the one shot where Tony stops and lifts up his shoe to compare it to the shoe in the corner window of the shoe store. That one shot upset him quite a bit because the body double was unsteady on his feet, and Travolta was anything but unsteady on his feet.
Norman Wexler's screenplay was adapted from the "non-fiction" magazine article written by Nik Cohn. Years later, Cohn admitted that the story, supposedly a fact-based account detailing the lives of Brooklyn teenagers in the early days of the disco craze, was a complete fabrication.
Bobby's car is a 1964 Chevy Impala hardtop. While director John Badham insisted on the Impala as Bobby's car, he was later told by Brooklynites that they would only drive an old Cadillac - and never an Impala. Each Impala (there were two used) was purchased by the film company for $1200. The Impala hardtop (with no post) is difficult to find today and will cost quite a bit more than the $1200 it did in 1977.
Five additional instrumental cues by David Shire were recorded for the film: "Barracuda Hangout", "Tony and Stephanie", "Near the Brooklyn Bridge", "Death on the Bridge", and "All Night Train". However, only one was credited, and all remained unreleased.
Originally, director John Badham filmed the dance rehearsal sequence with Tony and Annette's characters playing music in the background at the same time with the action and dialogue; a form of production conduct not usually done. The song was "Lowdown" by Boz Scaggs. However, after filming the scene, John Badham got word from Scaggs' people they did not want the song in the picture, and so the sequence was dubbed, with John Travolta and Donna Pescow recording their lines in a vocal booth, and in the end composer David Shire orchestrated an instrumental piece for the sequence; ultimately the song (the title still unknown to this day) was picked up by the National Football Leagues, and used to open and close the Monday Night Football program for over 20 years.
The movie was originally called "Tribal Rites of the New Saturday Night," the title of the New York Magazine article that inspired it. The film's title was ultimately shortened to "Saturday Night," as a direct reference to the fact that Tony (John Travolta) and his buddies inhabited 2001 Odyssey on Saturday nights. However, when The Bee Gees submitted the soundtrack, one of the songs, "Night Fever", was thought to embody the film's spirit better than the original. Director John Badham added the word "Saturday" and it replaced the original title.
One piece of music from the soundtrack, "Manhattan Skyline" by David Shire became very popular as background instrumental music. It has been played in movie trailers, promotional films and commercials. It's the piece that Stephanie is dancing to when Tony invites her to coffee.
Two additional songs for the film ended up not being used. One was The Bee Gees singing their self-penned version of "If I Can't Have You", and Samantha Sang's "Emotion." The latter was recorded by Destiny's Child in 2001 - the song was played on radio playlists after the September 11, 2001 terrorist attacks.
The lighted wall and lighted floor at Odyssey 2001 were not actually at the disco, but added in for the film. The "blinking light" effect on the wall was created by covering the wall in tin foil and reflecting blinking Christmas tree lights off of it.
Director John Badham claims in the DVD commentary that for performing product placement of a Trojan condom in one scene of the movie, he was given a lifetime supply - and that he "donated" them all to someone else.
In Tony (John Travolta)'s bedroom there's a poster for Rocky (1976), a film directed by John G. Avildsen. The sequel to this film, Staying Alive (1983), was written and directed by the star of "Rocky", Sylvester Stallone. In fact, Avildsen was the original director of this film but was fired by producer Robert Stigwood shortly before principal photography began due to "creative differences". John Badham was approached to fill in at the last minute. Tony also has a poster for Serpico (1973) on his wall. Avildsen was originally considered to direct that film as well, but left the project due to "creative differences."
The scene where Fran Drescher puts her hand on John Travolta's butt was not in the original script. Travolta and director John Badham thought that it would be something that a woman like Connie (Drescher's character) would do, however, so it was kept in.
In the last 10 minutes of the film, "How Deep Is Your Love" is playing as the dawn breaks over Manhattan, with the World Trade Center left of center screen. 34 years later, on Sept 11, 2001, in video taken in the Trade Center Plaza just before the Towers fell, the song can be heard playing in the outside music system of the plaza as the photographer pans over debris from the airplane impacts.
Filming was frequently halted on the streets of New York City because teenage girl fans of John Travolta would scream when they saw him due to his popularity from the ABC show Welcome Back, Kotter (1975).
After being shortened from "Tribal Rites of the New Saturday Night" (the title of the New York Magazine article that inspired it), the working title of the film was "Saturday Night". When The Bee Gees added a song to the soundtrack called "Night Fever", the word "Fever" was added to the film title. This is the second time a John Travolta project had the title altered due to a song (see trivia for Welcome Back, Kotter (1975)).
The trivia item below may give away important plot points.
Just to settle a few arguments: In the board game Trivial Pursuit, the bridge that Bobby C (Barry Miller) falls from is incorrectly identified as the Brooklyn Bridge. The bridge was of course the Verrazano Narrows which connects Brooklyn with Staten Island.