There is a precedent set in Newcastle upon Tyne, where "man" is regularly used, when addressing a male, e.g. "Are yuz gannin oot the neet, man?" (are you going out tonight, my friend?).
In addition, "pet" is often used as an affectionate means of addressing a female. Thus, one might ask "Are yuz gannin oot the neet, pet?" but in order to make that more gender-neutral, and less like "babe" or "hun", one might add "man" to the end, as in "Are yuz gannin oot the neet, pet, man?"
In extreme circumstances, a Geordie (for such is the term for a native of said city) might have already used the word "man" at the end of a sentence, due to it being an oft-used phrase, and so will add "pet" to the end of the sentence to acknowledge to the female that he is aware that he is talking to a female, but will further append another "man" to make the term "pet" seem less like a term of endearment. Hence, you can genuinely hear people say "Are yuz gannin oot the neet, man, pet, man?"