It will be late for outing after you get to the hotel in Tsuen Wan West. So, you can get around the hotel and there are some Tsuen Wan Plaza, Skyline Plaza and Nina Mall. On Jan 5, you can walk from your hotel to Tung Choi Street, where the lady's street is located. Then you can take mtr from Mongkok to Central. Walk to the peak Tram station in Garden Road. Then take tram bus or mtr from Central to Causeway Bay. After that, take bus back to Tsim Sha Tsui to Avenue of Stars. Perhaps, you can see the light show at 8pm in the anuve. The hotel has direct shuttle bus to the airport, anyway, costs a bit expensively. The nearest airport stop is still some minutes walking to the hotel. So, if your family has 3-5 members, consider to take taxi.