NYT: Cakes are meaningful, so it is no surprise that people sometimes bring them along to a restaurant as a celebratory coda to a special meal. And it’s no surprise that restaurants don’t always like it.

So restaurants often charge customers to cut and plate the cake. Sometimes they add a scoop of ice cream. The practice has come to be called cakeage. It’s a play on corkage, the fee a restaurant levies to open a bottle of wine brought by the customer.

Yes, he charges customers a cake age fee.

http://www.nytimes.com/2016/01/13/dining/cakeage-restaurants.html?_r=0