Clothing should be light for summer, but you should take sweaters and jackets for winter. Lightweight, Western style suits and ties. Bankers wear pinstripes. Wear a good watch. It will be noticed.
People tend to dress up when going out in the evening.
European-style hotel restaurants usually require a coat and tie in the evening. These are popular places to do business. A coat and tie are required at most clubs. Women do not wear shorts in the city. Temple Wear modest clothing.