http://www.google.com.hk/#hl=en&safe=strict&site=&q=best+gyms+in+shanghai&oq=best+gyms+in+shanghai&aq=f&aqi=&aql=&gs_sm=e&gs_upl=1045l4842l0l5056l21l12l0l0l0l0l0l0ll0l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=8fdbb9c24bf14054&biw=1281&bih=630
Yeah check out this website. It has some of the best gyms in Shanghai. You should be able to find one of the gyms that is the closest to Weining Road(metro line 2). They should also have some contact information on the website. Good Luck!
http://www.californiafitness.com/cn/en/whatsnew/Best_Gym_in_Shanghai
California fitness was named best gym in Shanghai just to give you a heads up!