It's a little hard to believe it's taken us THIS LONG to post The Bee Gees, arguably the most underrated group in history. Because of the Saturday Night Fever soundtrack that they put together, and largely because of this song, the group is remembered for their dated disco work. However, they were producers and hitmakers long BEFORE and long AFTER this song.
Unfortunately, they also did that ill-advised Sgt. Pepper movie, which probably hasn't helped with their reputation.
Back to this song, though. It set the mood for the whole movie and, really, the entire disco era. It's now remembered fondly, although Barry Gibb's extreme falsetto was frequently ridiculed in the years immediately following the death of disco. Now, I wish I had his voice.
The song is so awesome, they did a 2nd video for it, in a pre-MTV era where a video wasn't a foregone conclusion.