Hilton the Walk would be my preference.
You can use the pool and facilities of main hotel including sun beds and beach beds.
i would book room only as you will get breakfast anyway.
There are lots of restaurants on your doorstep or a nice in house restaurant called Crave that does evening buffet, pizzas etc
sometimes you can get a good 2 for 1 offer if taking dinner at Crave
As Diamond you will also get access to the Executive Lounge for afternoon tea and evening drinks and snacks