Williamsburg missed a crucial stage of gentrification; the phase where gay people were supposed to pioneer a neighborhood before the young hipsters could supplant them. The social hop-scotching has left gay people out in the cold in Billyburg, unwelcome in what should be a pioneer ghetto. The nightlife reflects the less-than-edgy environment that marginalized NYers try to seek out.“There’s like one go-go boy, what is that?” grumbled Matthew Kane, a scruffy 22-year-old photo agent. Still,......