I don't know who is entitled to go into the lounge, but the doors are wide open and I never had to identify myself to anyone, I just walked in. In the afternoon there were some water bottles and apples laying around until they brought the beer and wine glasses for the 5:30 to 7:30 "ritual". No breakfast in the morning.

Now that I think of it, it was probably open to everyone since they had signs by the elevators mentioning "unwind". I guess all guests were welcome to participate.

I would have probably preferred the 12th floor view that "SPG Aluminum" Catman mentions above, that looked towards the strip, than my 15th floor Platinum Upgrade view on the opposite end of the building that looked at an empty area across the street.