An engaged couple was attacked with a box cutter on Oct. 26 at 420, a club at 420 Amsterdam Ave. and West 80th Street. Cops said that at 3:30 a.m., a man grabbed the woman?s arm. After her fiancé told him to get off, the perp took out a box cutter and allegedly sliced the 25-year-old man?s nose. The 22-year-old woman told the perp to get away from her fiancé. He then sliced the groom-to-be in the right arm, police said. The attacker was not arrested.