Most foreign sex workers in this redlight area work at the casinos, night clubs and karaoke bars.
Here is one example how it works: A well known five star hotel in Colombo, located near the Galle Face, is well known for this. Almost any employee of a big hotel from Colombo knows somebody who knows somebody who can provide a room service.
Do not carry more cash you need and leave your valuables to the hotel, because there are many pickpocketing thieves and scammers in the area.
While hooking up with the working girls on street, always choose to consider the importance of safety and security in such cases.
One can always manage to get hooked up with working girls by calling them up.
Visiting the escort service websites in Colombo can come into play as well.