Does the city tour for one day include Aberdeen, Stanley market or Repulse Bay? If not, you can go by your self. For shopping, I recommend Causeway Bay for there are many boutique stores. For shooping for brands you can go to Central and Tsim Sha Tsui. For night market, Temple Street is the most well-known. The jade market is nearby. Hanging out at night in Lan Kuai Fang and SOHO in central area, there are bars and delicious food.