The peacock spider - or gliding spider - is, Wikipedia informs us, a native of Australia whose courtship dance is similar to those of genus Saitis.
What Wikipedia fails to tell us, however, is that the Maratus volans is also very good at performing Village People's 'YMCA' - as proven in this video by Dario Trovato.
Think of it this way, it's a life or death situation for them. If he wasn't good at signaling to the female, she may attack and eat him, as is often the way with spiders. And even that little fella got rejected! Though, I think he's probably happier with a simple rejection, rather than having her turn on him and eat his face. sweatdrop