Where can we go at night?

My family is staying at Park Guest House A Block Chung King Mansion, 36-44 Nathan Road, Tsim Sha Tsui. We are arriving at 9:40 pm at the Hong Kong airport. We'll reach our hotel at probably 11 pm. We need to check-in, so that's another 30 mins. Where can we go afterwards?(11:30 pm-12:50am)