The buzz rating in Cafe World means how busy the cafe is. Ratings start at 5.0 when the cafe is slow. This is the lowest rating a cafe can receive. The highest rating a cafe can receive is 105.0. Every time a customer is done eating, they will pay the cafe, and make the buzz rating go up 0.1 points until the rating hits 105.0. There will occasionally be a customer who leaves without being served. When this happens, the buzz rating will go down a few points. If the cafe runs out of food on the counters while there are still customers inside, the customers will slowly leave until the buzz rating hits 5.0. Even with a 5.0 rating, the game will still send customers in to the cafe.