We were on a two week cruise on Nieuw Statendam, in Club Orange. A few of the wait staff were very engaging and we wanted to add a tip in addition to the Daily charge. It is very awkward to tip one and not another on the QT. So, in the last couple of days, we slipped our waiters a bill in a handshake (cheesy I know). However, we unexpectedly did not go to breakfast in CO on disembarkation day and missed out on tipping another favourite waiter. Hard to know how we should have done it!