What not to do in Phillipines

I am getting some messages about hobbying in Philippines. Some day I will write about top things to do in Phillipines, but I want to warn everyone of a misconduct in Manila. Many girls that come to your room might ask you to go to dinner with them. They will make up stories like, their best friend wants to meet an American or cousin wants to do threesome at her place. Do not leave your hotel with anyone. Usually a pimp waits nearby and they ask for more money than what you agreed on. Usually they will not harm a foreigner because their police really makes life difficult for people who mess with foreigners but it will be a scary experience. I actually once agreed to dinner but only at the hotel. And throughout the dinner she tried to convince me to go out with her. Then I did some research (as I found out it odd) and heard from locals that it happens from time to time. Again, hobbying is safe in Manila just don't try to get too much bang for the buck.