What is the point in putting an adverbial phrase or clause at the beginning of a sentence?
Does that have anything to do with emphasizing?
At a female bar, female bartenders serve you drinks.
Female bartenders serve you drinks at a female bar.
Because I did not understand him, I asked him again the same question.
I asked him again the same question because I did not understand him.
But I think even with (2), with the stress on the right words, we can convey the same meaning as the Example 1.
For example, putting stress on "female bar" in Example 2, and it convey the same implication as the Example 1, which means that female bartenders serving drinks only at a female bar.