I want to thank Anna for posting the link to this postcard of White City Amusement Park. Here's what I know about the park (which is precious little considering that I spent a large part of my childhood playing in it's remains).
It was on the site now occupied by Parkside Elementary School, bordered by Confederate Avenue, Mercer Street and Eloise Court. My elderly parents still live a half block from the old lot.
The city councilman named Chosewood (I can't recall his first name) was the manager of the park. My mother still refers to the house on Waldo at the corner of Confederate Avenue which abuts the school grounds as the "Chosewood House".
In 1914-1915 White City Amusement Park was the site of union meetings leading to a strike at Fulton Bag cotton mill in Cabbagetown (this is documented in Cliff Kuhn's book about the strike).
If any other readers have further information I'd love to post followups.
The link to the postcard is p11319.jpg (JPEG Image, 348x225 pixels).