What are your lunch options without having to change for lunch?
There are 3 options. One is the pool grill which grill lobster, steak, fish, pork chops and chicken. Second is the lunch buffet near the beach. The third option is the main buffet which opens around 12:30 - 1pm which you can wear beach wear as long you are not wet.
Just to add to foodman -- for the poolside grill, you can walk up in your swimsuit. They have tables around it near the pool where you can eat. For the open-air lunch buffet near beach (right up from the poolside grill), you'll need to put on a cover up/shirt. And like he said, the indoor buffet you need to be dry (or at least pretty dry) and also have a shirt/coverup -- they made one of our friends walk around outside for a few minutes because he wasn't dry enough, but then let him in :)