There are no mosques near this hotel. In Beijing, the Niujie (Ox Street) Mosque, Beijing(https://www.travelchinaguide.com/attraction/beijing/niujie.htm) is the biggest and the oldest mosque. I highly recommend you to visit this mosque. From your hotel to Niujie Mosque, you can go by bus. Near the Crown Plaza Park View Hotel, there is a bus stop called Olympic Village (Ya Yun Cun). You can take the Bus 939 there to get to Jishuitan Bridge North （via 11 stops). Then, transfer to Bus 626 to get to the Niujie Mosque (via 15 stops).