Heart Attack Grill is still open! A fun stop in the downtown Vegas area.
We stayed at the Venetian on our last trip in October, and stopped in Yardbird for a drink. We enjoyed the bartenders so much that we stopped in there for a glass of wine every night before going to our room. The food looked awesome. I'm not sure I would consider the place fun or unique, but I think it would be a good experience regardless. There's also Black Tap in the Venetian with the outrageous desserts and shakes, same as the one in Downtown Disney at
Disneyland.
Hell's Kitchen at Caesar's is a fun experience if you're at all familiar with the show. Love Beer Park at the Paris, but only when its not too hot out. Awesome strip views in a casual setting. Our favorite buffet was Wicked Spoon at Cosmo, but the décor and atmosphere at the buffet in the Wynn was beautiful. We also love the Promenade at the Linq - fun places to stop for drinks and a few food stops, including In n Out which was a must do for us East coasters! We sat at AmeriCAN Bar and people watched, enjoyed the guy rolling by playing the piano. Even saw an MTV show being filmed while we were hanging out there.
I also agree with PP that Hash House A Go Go at the Linq is a great breakfast stop. Huge portions. We also enjoyed the Peppermill which is further north on the strip, closer to the Stratosphere end.
I don't believe they serve food at either, but Carnaval Court and the Piano Bar, both at Harrah's, are not to be missed. They are steps away from each, both near the Linq's side entrance. Carnaval Court has great live music both day and night as well as flair bartenders which are so fun. Its never boring there. The Piano Bar is primarily an evening dueling piano show, the two blonde twins are great.