Yo Rat! is the recently-opened new enterprise by Gimlet of Gimlet's Hole Food Delicatessen fame. It can be found on Attic Bee Street It parodies Roundworld's YO! Sushi, which is a British restaurant chain started in 1998. It uses the Japanese style conveyor belt method of delivering sushi to customers. In each restaurant various sushi dishes and other Japanese cooked foods are prepared in a kitchen in plain view of customers and then set on the thin conveyor belt. The belt carries food around the restaurant in a circuit, allowing diners to pick any dish from the belt for consumption. How this converts to Ankh-Morpork is anyone's guess, but presumably it involves various rat delicacies being paraded round on some contraption created by one of the Cunning Artificers.