Let's talk about frozen yogurt for a second (bare with me). Frozen yogurt has been around since the flower power days of the 1970s. But the froyo industry recently experienced a major resurgance with the introduction of a self-serve model. Self-serve froyo shops allow customers to fill their bowls with as many flavours and toppings as they desire. The self-serve model now accounts for over two-thirds of frozen yogurt stores worldwide.