I honestly think he was fresh of the boat and probably did not understand how the drink thing works, it's easy to fall into that trap if you don't understand how the ladydrink thing works.
Some guys think they are being scammed and they probably are but just pay up, leave and learn from the experience.
I had a bit of Truman effect walking around sober in Pattaya last year (designated driver) and you realize just how <deleted> fake and honestly depressing Pattaya truly is.
Like a character in a movie who has just discovered he is in a movie if you will