Up to 30 guests can be seated at the room's dozen tables, each adorned with crystal glasses that circle the reproduction absinthe water fountain at the centre.
There are some systems that actually will take a circle and drop it just below the surface of the water and have the oil kind of flow into it, almost like a drain, recover it and pump it out.
He planted beech saplings in a well-spaced circle and, according to one story, then carried bottles of water up the slope to irrigate his saplings daily on that arid summit.
Let me take you on a quick tour around the world and introduce you to just a few of the people and places Circle of Blue is finding on the front lines of a global water crisis.
Carl Ganter is co-founder and managing director of Circle of Blue and is vice chariman of the World Economic Forum Global Agenda Council on Water Security.