We went here after a nice evening in the Jack Singer Hall with some friends to chat while having some drinks. The lounge is very nice and comfortable.
What I would improve is the lighting of the spiral stairs to the upper floor where the washrooms are. The stairs are completely black and hard to see as they seem to have no separate lights.
We ordered beer, a cocktail and some soda. You can't do too much wrong serving a bottle of beer and the cocktail was fabulous. The soda however was a flop: no sparkling at all so it came probably out of a bottle which was first opened days ago.
Taking into account that you are in a more exclusive place this is a shame.