How Choreography Can Help Robots Come Alive

Consider this scene from the 2014 film, Ex Machina: A young nerd, Caleb, is in a dim room with a scantily clad femmebot, Kyoko. Nathan, a brilliant roboticist, drunkenly stumbles in and brusquely tells Caleb to dance with the Kyoko-bot. To kick things off, Nathan presses a wall-mounted panel and the room lights shift suddenly to an ominous red, while Oliver Cheatham's disco classic "Get Down Saturday Night" starts to play. Kyoko--who seems to have done this before--wordlessly begins to dance, and Nathan joins his robotic creation in an intricately choreographed bit of pelvic thrusting. The scene suggests that Nathan imbued his robot creation with disco functionality, but how did he choreograph the dance on Kyoko, and why?