This is an old film I try to find online. My searching found two videos available on youtube about the main dances scene and intro of this movie. Later, I found a great tutorial from a good teacher in the US. Take a look:
The difficult part is the lift and coordination. You need in my opinion about 5 months to perform this level for `more than a woman´recommended as a beautiful start coreography, then follows with ´Stay alive´gradually, because it has many strong movements with your hips so, it is not an inocent dance. John Travolta was a joung boy of 24 when doing this, do not understimate the soft swing.