“Countless workout fads have come along since the heyday of Jazzercise: Tae Bo, Pilates, Zumba, boxing, spinning, pole dancing. And yet Jazzercise persists: today, according to the company, there are more than seven thousand franchises, serving roughly two hundred and fifty thousand customers in twenty-five countries and grossing somewhere between ninety-five million and a hundred million dollars per year.” – The New Yorker