Two Queens gang members were busted yesterday, accused of blowing away a female pal at a drug-laced party for the hell of it, law enforcement sources said. Ramiro Pineda, 20, and William Ramirez, 22, were slapped with murder charges in the shooting death of Maria Rubio early Tuesday in a College Point apartment, cops said. Sources gave a chilling account of the slaying, which occurred when Pineda and Ramirez, both of Flushing, were partying with Rubio and other men in a second-floor 130th St. pad. "Let's shoot the b----," one suspect said, and fired, hitting Rubio, a source said. "No,...