Kuala Lumpur was the meeting point of east and west and this is secret of KL attraction. Malaysia was the biggest trading hub and the meeting place of different cultures, religions, languages and so on. But as a side effect, most international trading centers -not only in the past, but also theses days- became an spot for entertainment.
KL was not excepted too. Bunch of opium smoking houses and gambling halls had been there around the main downtown square.