I think it is best to start off by addressing the biggest elephant in the room. Now, this is not another case of an in-group bias where I’m praising my own people and culture, for a decade there has been a trend of cases where people traveled halfway across the world to look for a romantic partner in Thailand.
Siam Paragon and bookstore may bring anxiety to some, but it will bring you the best results.
The quality of potential romantic partners you meet during the day will quite often exceed those you meet at night.
Talking about topics such as political party, Royal family, or religions can lead to your potential partner rejecting you completely (or hours of lecture).
In either case, do avoid talking about sensitive topics.
Remember, making mistakes certain mistakes such as these will put the girls in the defensive mode.