This "mansion" is called The Mansion at MGM Grand and it’s one of the most exclusive lodgings in the world. The hotel-within-a-hotel contains 29 villas ranging from 2,500 to 15,000 square feet. They’re reserved for the highest of high rollers, but you can rent a one-bedroom suite for $3,000 a night.
The Mansion is described in detail in Deke Castleman's upcoming book about high rollers, Whale Hunt in the Desert. Here's a preview:
It was with the debut of the six-acre 29-villa Mansion at MGM Grand in May 1999 that Las Vegas reached the pinnacle of exclusivity in accommodating its whales.
The Mansion occupies a completely separate building from the 5,005-room MGM Grand mother hotel; it’s built on property reclaimed from the unsuccessful MGM Grand Adventures amusement park. The well-heeled guests enter through a one-ton solid-bronze gate inlaid with Austrian custom-beveled glass, which accounted for a full percentage point of the Mansion’s total cost. In the common area at the entrance they can smoke a cigar, sample exotic fruits from the welcome basket, or sip a glass of champagne. They can also examine 200-year-old French vases, antique Moroccan lamps, and abstracts by name artists, and listen to Mozart. Discerning guests might even notice the subtle aroma of bitter orange wafting through the air.
Each of eight garden villas has two to four bedrooms (two villas can be combined for a six-bedroom megavilla), a private garden, and an indoor pool. Asian guests are placed in the villas with fountains stocked with water lilies and koi. Separate service entrances admit the villa butler and housekeeper, and chefs stock the pantries.
The Mansion has 150 full-time employees, with a substaff of 43 butlers who speak upwards of 20 languages among them. Every member of the staff must sign a confidentiality agreement, ensuring that no one says nothin’ ‘bout nobody. The Mansion is an extremely secure enclave in the midst of the largest hotel in the world and there’s plenty of privacy from the hoi polloi, but not from the Mansion staff. They get to see intimate personal details of these people’s lives, and sharing any of it could cost them their jobs.
When the guests check out of the largest of the villas, the crew that descends consists of four to six villa attendants who make up and refresh the rooms; a floral team that replenishes the fresh flowers; a maintenance team that conducts routine inspections of the lighting, air-conditioning, electronics, and facilities; a landscape team that checks on the ponds, fountains, and greenery; and a water-quality team that treats the private pools.