Not so long ago, in the sweltering dog days of summer, the most popular kid on the block was always the one who had a pool. But, like central air conditioning, what was once considered a luxury is now pretty much a given — at least for condo developers. When it comes to pools nowadays, the question is really whether to build it within the building or outside, usually on the roof.
http://news.nationalpost.com/homes/pools-are-becoming-an-important-element-for-condo-buyers-with-beautiful-form-desirable-function