Frozen yogurt is a guilt-free treat, like a rerun of Cops in which all the criminals learned a lesson and later became librarians. Tell your taste buds to "freeze!" with this Groupon. $12 for $25 Worth of Frozen Yogurt and Toppings Customers receive a punch card with five punches good for $5 worth of frozen yogurt and toppings each. Self-serve machines dispense sweet swirls of nonfat, no-sugar-added, and low-fat frozen yogurt in flavors such as red velvet, tahitian vanilla, and blueberry tart. Dairy-free sorbets also are available. At the toppings bar, guests can top tempting peaks with heaps of fruits, nuts, and candy. Price is determined by weight ($0.45/oz.).