By bus: take bus 113 at Metropark Hotel Kowloon, Waterloo Road station near your hotel and alight at Lung Wai House, Tung Tau Tsuen Road.
By MTR: it takes a few minutes to MOngkok East and Mongkok MTR stations from the hotel. So, if you travel with kids or senior people, choose the first option. Or it seems that the hotel offer free shuttle bus to Mongkok MTR Station. Then take mtr to Wong Tai Sin Temple via stopover at Kowloon Tung.