I will just say that when I was on Coco Cay during my Anthem cruise, I had a day bed on South Beach and was directly on the other side of the foliage (a pretty good distance PLUS all the leaves between them) from Hideaway and I could clearly hear the music blasting and thumping. I can only imagine how loud it would be there.
That may not bother you, but it's something to be aware of. It may be adult-only, but it's not meant to be serene...it's meant to be a party.