My family is sailing on the Wonder in April, and have late dinner seating. We are waitlisted for early seating. If we ultimately end up with late seating, there is no way that my kids can stay up that late without melting down (their bedtime at home is 7ish). Thus, if we do not take dinner in the dining rooms, would it be proper to reduce the dining room waitstaff's tips by 1/3? I realize that tips constitute the vast majority of their income, but I myself do not expect payment for services I do not render. I'd rather tip the individuals who do end up serving me dinner rather than those who do not. What is everyone's thought on this?