The circle on the terrace is actually the skylight for the glassed-in reflecting pool below (not accessible) that the gym wraps around.I haven't read what circle design is all about but I assume it's described somewhere in this thread. I agree with what mathew921 says that this is very interesting and unusual and quite beautiful.. All the complaining is this thread interesting too assuming it's all about the hope that new projects in Toronto will continue to improve in the design realm. However many have been disappointed with so much blandness with a lot of hype in the beginning stages of development with poor results. I've been kept very busy following all the new projects in general and have enjoyed the sheer number of proposals. I hope they keep coming!