<Hongtai, on Shanshidong Road.
/#word=%BC%C3%C4%CF%CA%D0+%BA%B5%B1%F9%B3%A1&ct=10& Take a look.
And, to have fun, Quan Cheng Square is a good choice, is too many people. Shandong Hall inside can play, just don't slide in, the guards will manage. You can go in and change your shoes. Just say to eat, and then go around to the back door of the hall there, the field is very big. I had a teacher who loved roller skating and went every week.
There's one behind Heroes Hill, too. It's not a big rink, but it's a roller rink during the day and a dance floor at night.
That's all I know :)