The Leafy Green was a tapcafe on Coruscant. It was built around a central pillar made to look like a tree with branch growing across the ceiling. Its leaves blew in a breeze. The carpet was made to look like leaves, the tabletops were mossy, and the waiters were not droids.
Given the plant-based theme and the fact it was in an are of Coruscant covered in plant-shaped lights and Spero's yellow fungus, it likely was either made by or catered to Ho'Din.
Mara Jade Skywalker and Anakin Solo came there investigate Tekli's suspicions that there was a Yuuzhan Vong infiltrator working there. Mara noted that since the Vong did not like mechanical "abominations", they would probably choose this place to come to.
- The Complete Star Wars Encyclopedia