Just wondering, at what level of tips included would you not consider tipping extra for included services? $50 pp/pd? $100 pp/pd? I think it's clear that room service deliveries are an included service and they share in the tip pool. I assume the cruise line has figured out what tip level is required to provide a decent paycheck for the staff. When I was last in London I noticed a 12.5% service charge in most of the restaurants that we dined. I concluded that was the appropriate tip per the establishment and since we usually had a very nice bottle of wine with the meal we would leave it at that. BTW, we sail Retreat and always tip extra at the end for above and beyond service.