For Rumbles, eating a burger must be easy. They do not believe in too many frills and have therefore created a concept that makes it very easy, quick and manageable to order a burger. A burger in their world must consist of few ingredients, and not be too "modern", it must taste good without trying to be something it is not. The menu card is therefore easy to understand, so you can quickly make your choice when choosing your burger. They often have campaign burgers, or burgers as their local regular customers have helped to develop, as listening to the guests is important for them.