Regarding farangs trying to speak Thai.
First of all I don't mind if people try to learn Thai. By all means. But I have to share what I have heard from several girls both freelanceladies and regular girls. What they all have told me is that they don't like foreign people to speak Thai. Very few can handle it and better for use in the supermarket / governmental buildings than in mongersituation with a girls present.
As far as I know they are not impressed at all and in fact they like that foreign people speak english and that is it.
Atleast regarding the regulargirls (wine and dine and doing the proper date routine) speaking Thai will not get you faster into the interesting business if I stick to my information provided by girls interviewed by me in english.