There are many "all you can eat" restaurants offering a variety of cuisines. Here are some notable ones:

• In Mainz, there are several all you can eat places including Saigon Rice with Vietnamese and sushi dishes, and Asia World focusing on Asian cuisine including a Mongolian grill option.

• Hamburg features diverse options like Korean BBQ at Mr Kao, hotpot at Spicy, tacos at San Burrito, and an extensive sushi and grill selection at Kofookoo. There is also French crepes and raclette at La Crème de la Crêpe.

• Munich offers 11 options ranging from pizza buffets at Solo Italia to sparerib nights at Da Wirtshauser, alongside sushi, hot pot, and breakfast buffets.

• Düsseldorf and Leipzig have all you can eat buffets with various international offerings including sushi and traditional dishes.

• Factory Buffet offers American, Mexican, and Greek buffet experiences.

• XIAO is noted for an Asian crossover all you can eat buffet with sushi, wok dishes, and a dessert fountain.

These restaurants cover many tastes and styles from Asian cuisine, BBQ, pizza, to traditional European dishes, often with set prices letting guests eat as much as they want. If a specific city or cuisine is desired, that can be narrowed down further.