It has been confirmed via field testing that gyms will not only exist and be ran by the players, but will be set on-map at real-life locations, particularly locations of historical and cultural significance.
This brings the question of where people will decide to have their gyms, should they choose to run one. As a Chicagoan, I hope to establish my Ghost-type gym downtown in Congress Plaza, though Congress Plaza itself is not necessarily historical. There will most likely be a gym location at Buckingham Fountain, which is in Congress Plaza, but it seems more suitable for a Water gym. However, if that's what I got, I'm taking it!
How about you all? Where do you hope your gyms will be? What type(s) do you plan to utilize? Feel free to express and discuss!