Yumz Express is an easy and affordable way for stores to offer delicious frozen yogurt, without a large commitment of floor space, said John Barnes, co-founder of Las Vegas-based Yumz Gourmet Frozen Yogurt.Yumz Express is a kiosk-sized version of a full-size Yumz Gourmet Frozen Yogurt store designed to fit inside existing stores, such as movie theaters, restaurants, grocery stores, convenience st