Restaurants charging customers a fee, called “cakeage,” for bringing their own cake is nothing new. One London restaurant charged $14 a slice back in 2016, the New York Times reported. (The fee can be explained by the fact that restaurants make money by selling food, and if you bring your own dessert, you are not paying them for food while still occupying tables.) On Reddit forums like r/Serverlife and r/TalesFromYourServer, fees of $1.50 to $4 per person are more commonly reported by workers.