A lot of them are what’s generally called hostess bars, which is just another word for bars where prostitutes hang out.
The girl probably did it for reasons that have not much to do with love but more with financial stability and a different life style.
These girls don’t work there because they like it but because economic circumstances drive them into this kind of work.
That there are so many nationalities present doesn’t make things any easier either.
An American or German is definitely different from a Spaniard, an Italian, or a Frenchman, though I notice without being able to substantiate this with solid numbers that there seem to be more Australian, British, and Americans here, in that order, than any other nationality. So a teacher or a businessman will probably be and act different from a sailor, to use an extreme.