A few people here, a lot of people at alt.vacation.las-vegas, and several other internet sources report of the off-the-menu "Gambler's Special" for $7.77 at Mr. Lucky's in Hard Rock Hotel. It sounded pretty good at 1am, so I decided to try it.
It does come with a salad, which was pretty simple greens a few stale croutons and some tomatoes. The steak is a flat New York strip, there are some mashed potatoes, and three shrimp on a skewer.
The strip steak wasn't the medium rare I asked for, and quite tough. The the shrimp dosen't seem like they had been seasoned at all.
Well, I guess you get what you pay for. But never again!