For Singapore try joining this Yahoo Group:
[email protected]
They are hotel based Thai girls, fresh and young good prices.
Otherwise make sure you pay a visit to Orchard Towers locally known as Four Flours of Whores - although be careful of the Crazy Horse as that has a lot of Trannies. The real red light district is Gai Lang which you can research by going to the Sammy Boy forum
http://sammyboyforum.com/ - a good site but doesn't hold a candle to 141.
Good luck, have fun.