We are sailing on the Beyond, February, 2023..As we usually do on Celebrity website, wanted to book our specialty restaurants in advance..However, we now see that Celebrity is adding an 18% gratuity to the cost of the restaurant booking..Never had to pay a gratuity in advance..So, in the event that the service is below par, we have pre-committed to an 18% gratuity..I understand that although we have prepaid gratuities, specialty restaurants may not be included under that umbrella..But, any added gratuity to my experience in a specialty restaurant should be determined by us, not Celebrity..