My husband and I ate here the last night we were in Vegas and planned on it being one of our "splurge" dinners. It was definitely on the expensive side but worth every penny.
I wore a dress and my husband wore a suit to honor Frank by being dapper. Overall, people were dressed quite nice although he was the only one with a suit jacket on. Just don't wear short and sandals (duh!).
I thought the restaurant was gorgeous! It was dramatic without being too overly done up like other parts of Encore and Wynn. The chairs were comfortable and we had a nice view. And of course the music was great. :-)
Our waiter was amazing and there was a sommelier on hand.
We started with a special appetizer of fettuccine in truffle butter sauce with a huge serving of fresh shaved black truffle on top. It was like a little bit of heaven in my mouth. I had agnolotti (ricotta filled pasta) with spinach sauce which was lovely. But the real star of the show was my husband's tagliata (rib-eye). It was the best steak of the week (and we had many steaks at many steak places). My dinner was really good, but his was amazing.
I would definitely recommend Sinatra and I would recommend the rib eye!