The same thing happened in Angeles City, formerly home to Clark Air Force Base, an hour north of Manila. Rather than billion-dollar port facilities, however, all Angeles' entrepreneurial mayor had to market was one long runway buried under ash from Mount Pinatubo's eruption. Angeles was taken over by Australians, who have opened bars, restaurants, hotels, and any other vehicle they can think of for marketing a huge oversupply of girls. From the Sundowner Hotel in Ermita, air-conditioned buses run several times a day to Angeles. You can also arrange hotel accommodation for Angeles at the Sundowner.
Most accommodations are fifties-style motels, with small swimming pools, and the food is decent.
Several Australian companies run tours from there straight to Angeles, bypassing Manila altogether. Australians themselves are generally a carefree and fun-loving lot, and if you're alone, it's very easy to fall in with a group at your motel or at a bar. Believe me when I say that they will know all the best spots. I don't know how long it's going to last, but for now, Angeles City is the only town I know of whose entire economy is based on the sex trade. It's worth a try, if only for a weekend.