Sentence:  But while Crosby was their first main topic of conversation, Johnny and Ginger soon began to have the experiences that draw people closer together. [...] “For years,” Mercer said, “anytime anything went wrong, <WSD>Ging</WSD> and I would just look at each other and say ‘Borough Hall!' and think of that poor man who thought he was on his way to Harlem.” 
Meaning of the word marked with <WSD> tags:  A diminutive of the female given names Ginger and Virginia.