This was a hidden bar under the Aviary. We went on the waitlist while we were eating at the Aviary. But then one of our waiters from the Aviary hooked us up and we got bumped to the front.
The bar tender actually is the head bar tender for the Aviary. I got their version of the Manhattan, which had a chocolate and banana twist. Really great.
The exclusivity was also shown when you had to use a key to get back inside if you wanted to use the restroom.