For the bar area only:
Decor is beautiful.
Ambience is nice - the place is small, so you feel like you're somewhere away from the bustle of the casino and everything. It's quiet inside and the small bar is usually surrounded, but you can still find seats. It makes you feel like you're having a drink in a really swanky steakhouse (which you are!)
Drinks are delicious - a good selection of martinis and of course beers/wines for those types, too!
Prices - this is the best part. Half off all martinis during happy hour (5-7 EVERY DAY! and 9-11 Mon-Thurs).
It's not a place I want to hang out all night, but I do love stopping by there for a couple martinis before heading somewhere else (or for an after-work drink)