Went there for my son's 20th birthday. Food was ju...

Went there for my son's 20th birthday. Food was just okay. I stopped by the kitchen and told our waiter it was my son's birthday and did they do anything special. He nodded. Then he and other waitstaff came out with a flan with a candle on it and sang something in Spanish. Nice, right? Except that I was charged for it. Not that it was that much, but I should have been told that I would be charged for anything they do. What happened to restaurants doing something special for birthdays? It just really irritated me!