A quarrel over a woman at a popular Hamptons bar turned bloody earlier this month when a man stabbed his friend in a fit of rage, according to sources and a report. Two pals who work at Southampton restaurants were drinking after their shift at local watering hole Fellingham’s at around 1 a.m. on Aug. 18 when they began to argue over a woman that was part of their group, according to sources. The pair started screaming at each other, fists flew, and then one man pulled out a knife and stabbed his friend several times in the stomach, according...