they were looking for you, the real honest WGs don't hang out in LKF trying to snag a drunk player, they are more demure in the various Wanchai bars waiting for you to buy them a drink.
it goes back to the lesson learned some 20 years ago when I spend one year backpacking around the world, anytime you are in a country where the folks don't normally speak english (this is HK, not Singapore, so it applies here) and you are minding your own business and some one starts speaking to you in Englsih completely unsolicited, watch out. It usually ends with you parting with some of your money.
Keep on mongering