It's a town about 150 miles south of Bangkok* which isn't much to look at and is probably the least attractive place in all of Thailand but it is filled with neon-lit go-go bars and women, men and every gender in between looking to be your "temporary girlfriend" - or boyfriend.
What makes Pattaya special is that it's much, much cheaper than the affluent Cities of Thailand. "Short-time" (look it up) with a go-go girl in Bangkok will cost you in the region of 3000baht (100 baht = £2) but in Pattaya it's less than 1000baht. Prices are even lower in normal "beer bars", go-go bars are generally the expensive option.
I should add as a disclaimer that most of them are prostitutes but there are also a large number who won't expect anything more from you than to be treated to meals, drinks and a few treats.
This website has lots of information about Pattaya:
http://www.ladyboyspattaya.com/
You have to be careful about the risk of STD's (always, always, always use condoms) and you should also consult your doctor before visiting Thailand to get vaccinations but so long as you don't go with "freelancers" and stick with the most reputable bars such as Ezy Bar the risk is relatively low.
I will be heading for Pattaya sometime in early 2011 on a budget of around £3000 which will cover all my expenses for a 3 week trip and it will be enough money that if I want to I can get banged in the rear by really hot she-males twice a day, every day! I can be sure that I will run out of stamina before I run out of cash so long as I don't go crazy.
There are all kinds of ladyboys, some are post-op, some have boobs, some don't, some look and sound so exactly like real women that you've got to be an expert to spot the difference unless you see what's between her legs! I've read that there are a few ladyboys in Pattaya with 9-inchers!
And yes in case you aren't sure, most (if not all) can and will penetrate you and keep going until you're completely exhausted.
She's got a what??!!
*tourist note: Bangkok is actually named Krung Thep Mahanakhon.