The Diamond lounges in AC are way better than Vegas. I like Vegas but they are limited compared to AC. Diamond lounge @ Caesars has a great view and if recall correctly, they have hot food all day unlike Vegas. Of course I even like the DL @ Cherokee better than Vegas, food all day and they stay open until midnight on the weekends. I think it sucks that the one in Vegas closes at 9pm. The bad part about Cherokee is paying for drinks but at least the drinks are cheaper in DL than on the floor and you can even pay for them using Total reward credits.
One thing to remember with the DL at Caesars AC is that they want to charge you the 1000 RC each time you go into the lounge during a day. They will however not charge you the second 1000 if you leave for 30 minutes or so. Just clear it with the person at the desk when you leave. What they don't want is for you to have late lunch and then dinner using the same 1000 RCs for the low Diamond player. (That's us!!). They do close at 8 PM (I think) on week days so we generally go in around 5 or so have couple drinks, then dinner then couple more drinks. Then if able, go out to play around with the slots some more. Very relaxing and a great way to spend a few hours without being forced to sit at slot if you want to sit down. HHH!! Our goal is to go to destination places, spend about 6 hours playing and the rest of the time relaxing and enjoying the property/location. And at same time using the bonus system to maintain Diamond status.