There are times in workplace design when circular shapes best suit a scheme. There can be lots of reasons for this including pure aesthetics and avoidance of monotony.
One other notable reason is the way in which a round office table can bring together a group of coworkers. Each colleague faces inwards towards everyone else. There is no end or head sitting position to suggest any one person is in charge; everyone can feel equal and be free to contribute. In short a great collaborative nucleus is created.
Similarly, small versions can be great in workspace caffetterias. In this role a pedestal style base is used such as on the Rigg Disc model. This allows ad-hoc 360 degree seating positions which are perfect for relaxed socialising away from the desk.
Before deciding on which product to use, remember to check if you envisage needing power and data services now or in the future. Also how will cable management be accommodated.