I went to the Plum Lounge for a friend's birthday. We had a lovely time and received the ultimate VIP experience from Joe and our lovely server who's name I think is Connie? The food portions are small, but they more than make up for it with their alcohol portions.
The server was very honest with us and told us we might want to order 2/3 plates of each dish because they're very small. I loved how she was there for our group for everything- a special request of cherries, she got it, another request for warm cookies, done. She even sent us back to our rooms with bottles of their pricey Icelandic water ($10 a bottle!)
You truly are treated like a high roller in this room. I felt the VIP status as soon as I walked in. No one said no to us, except for the milkshakes, apparently they don't make them, but they did make a killer mudslide.
Pros: skirt skate, sirloin, salmon, service, generous pours
Note: It's VIP and less than 1% of Hard rock guests will ever experience this room behind two velvet ropes. Enjoy it while it lasts.