Royal Caribbean Gratuity Tip
Royal Caribbean automatically include gratuities in the price of the cruise (roughly $150 for a 13 night cruise, but this varies per cruise).
When booking your cruise, you can request that this amount is removed from your fee. Then you can decide later how much and who you choose to tip when on board the ship yourself. (with the automatic option it is split between all service areas on the ship)
The only condition attached to this is that if you select to remove this option, you will be asked to select a set dining time.