answered:
Ginyu is a phenomenal actor, if only out of necessity. There are a lot of risks, especially when it comes to bodyswapping, especially if he were to be revealed in such situations where he could be killed onsight. Having an idea as to how to temporarily act as his victim is rather important, if only because it may give him an opening to get away.
He can also find muse for his dances and poses in any type of music. As long as he can find a rhythm, he can make it work.
That being said, training sessions with the Ginyu Force usually have music playing in the background, whatever is playing alternating between sessions by rock-paper-scissors for who gets to choose it.