If the mechanisms to revolve the Restaurant are in fact gone, then IMO it would be quite a "pretty penny" to re-install; don't think anyone would want to take that on for cost alone. Also, as a young Whipper Snapper back in the 70's, me and a Friend of mine, both of us were in the Navy, used to go clubbing when there were quite a few bars and restaurants downtown back then. We stumbled upon a long line going into this building (some called it the Ivey Tower back then) and asked what was going on and was told that a new disco had opened on the top floor. I believe the name of the disco was the "Penthouse." It didn't take us long to get up there as the line was moving fast as were the elevators. But when we got up there, after a few drinks, we realized that it was a gay bar (ha ha/LOL), so we left. A week or so later we ended up, after going to a few regular discos downtown and around town, checking the Penthouse out again, more so out of curiosity and to get some laughs (and boy did we); but we ended up really having a good time and even "scored," as we used to call it back then when you left a disco/club with someone; not with guys, but with a girl each! Fun times at Ridgemont High!!!