Luxury hotels all around the world have one single ambition in mind: keep their deep-pocket guests happy. For most properties, that means impeccable facilities, a top-of-the-line concierge service, and sometimes even small gifts. But for a smart few, that’s simply not enough, especially if they want to stand out from their competitors. As such, they go above and beyond to satisfy their guests by offering next-level amenities. And no, we’re not talking about high-quality linens and fancy in-suite coffee makers.…