Here’s an article (The Seattle Press – Dancing Your Passion: On Love and Obsession) on zydeco dancing in particular, but on dance obsession in general. Here are some quotes:

• …ask enough dancers about why they dance and a common theme emerges, that of an experience of transcendent joy.
• We enthusiasts will go to great lengths, often incomprehensible to outsiders, to immerse ourselves in the dance.
• “I’m ashamed to say this,” says [name your favorite dance addict], an avid dancer, “but I schedule visits with my own parents around [favorite dance form] dances.”
• Yet as time goes on, nearly every dancer will relate tales of injuries arising from the repetitive stress of set patterns of movement, and hobbling around on one’s sore knees after a night of hard dancing becomes habitual and accepted.
• Desires to linger at dinner parties, or to spend quiet evenings at home, go unrequited. Friends drift away, and activities in which one used to delight get shelved in favor of dance.
• Put simply, our passion is in pursuit of “perfect dances” where one attains euphoria–a feeling of being in love.