Here are some hotels near Longtan Park: Crystal Orange Hotel (Beijing Chongwenmen),Lake View Hotel,Beijing Zhongle Six Star Hotel,Tiantan Hotel,Bejing Guangxi Hotel
You could try JingWei Zhai·Beijingmudankaoya (JingSonghaiwendashaDian),Qing Yi Cao Yuan Shuan Rou Guan,HuaWei RouBing Dian(Panjiayuandian),Hui Xing Ju Lao Beijing Xiaochi,Alan Restaurant