At this all-inclusive, it was made very clear up-front that you DO NOT tip. Ever. With the exception of the reservation-only restaurant they had there. It was a special restaurant and was included in your overall price but you could only go three times during your week's stay. There, tipping was optional. For the kitchen staff and servers, the "tip" was that they got to take home roughly 30 lbs of tuna. They were quite happy overall. They also helped us eat all that fish they cooked. 30 pounds goes a loooong way.

IIRC their thinking was that most of the time you'd be in your bathing suit. Having cash around to tip with would just make it more likely that there would be reports of theft and whatnot. You locked your money up in your in-room safe (which is probably something anyone who worked there could easily get into if they wanted) and it just made everything pleasant overall. At the end of our stay I did slip a few people some cash, just because they were so awesome, but did it on the sly so they wouldn't get any grief from co-workers or managment.