Families, college students and Hyde Park locals tend to favor flavors like cake batter and pralines and cream at this serve-yourself frozen yogurt shop. Five yogurts and one sorbet are always on hand. Customers choose their flavor, add their choice of 30 toppings--fresh-cut fruit, Fruity Pebbles and other items--t their 16-oz. cup and pay by the ounce. You can, of course, take your fro yo to go. Or, if you'd prefer to dine in, some seating is available inside the powder blue-colored shop; and on warm days, the seats near the giant glass windows, which owner Zenzile Powell often opens, allow for prime people watching.