The ones I know of are Gongnong Road, Yantian, Yunqiao, New Century, Golden Years, Zhinong Road, and Gymnasium
The Gongnong Road ballroom is at the intersection of Zhonghua South Street and Gongnong Road
Yantian Ballroom is across from Zhongshan Gymnasium on Ziqiang Road
Yunqiao Ballroom is at Canal Bridge
The New Century Ballroom is at the southwest corner of North Station Square
Golden Years Ballroom is on Jiuzhong Street
The Zinong Road ballroom is of course at the The new century ballroom is at the southwest corner of the North Railway Station Square
The Golden Years ballroom is on Jiuzhong Street
The Zhinong Road ballroom is of course on Zhinong Road
On the opposite side of the gymnasium ballroom is the Shida Annex Middle School
There is also a ballroom near the Ping'an Park but I don't know the exact location
PS: I heard from a hearsay that there is a ballroom near the Cotton One and Cotton Two, but I don't know the exact location
.