From an e-mail I sent in 2009
Bangkok, as you know, has many girly bars and bar girls (prostitutes). There is also a smaller section of clubs for gay tourists. (See photo # 3) In Thailand, there's generally a very tolerant view towards most types of people. What would be more insulting to Thais would be attitude problems: being impatient or hot-headed or constantly griping.
Just to tell you how "out there" Bangkok is (certainly in some areas) there was a huge salon in a bustling part of town with the giant name, Gay Haircut. Sometimes Thais try to be cute with language, but it can be weird at times. Like in many hair salons back home, here the stereotype is that males cutting hair (women's) are gay. But in establishments where certain goods (i.e. sex) are being traded or certain risqué trade is being marketed, well, you can see names like pussy lounge, hot boys, etc.. This would shock most Americans.
Thais are not always as tolerant as I make them out to be. However, concerning gays, they seem far more tolerant. The big difference I see, between where we were raised and here, is the religion. Fundamentalist Christianity (evangelicals) teaches in churches, private schools and communities that being gay is a sin and the Bible is perfect. Here, there's no religious element that shapes minds along those lines.