The Taiming International Enterprise Park I know should meet your requirements. There is a gym in the park, close to Taihu Painting and Calligraphy Institute and Beijing International Book City Trading Center. There are 3,200 square meters of clubs in the park, including swimming pools, specialty restaurants, superior rooms, private meeting rooms, health physiotherapy centers, fitness clubs and supermarket convenience stores. The environment in the park will send you some photos I took.