As Shanghai was divided into different concessions loosely governed by multiple parties, there was greater freedom there for sing-song girls to come into the public eye without legal repercussions. Being in the streets, they had little protection from law enforcement and thugs, leaving them doubly at risk of arrest or assault. The girls had one or several male sponsors who might or might not be married and relied on these sponsors to pay off family or personal debts or to sustain their high standard Songo Girl singing in living. Like a baws. The term originally came from them charging three yuan for company and three more to spend the night. Then it really doesn't matter because she'll love Songo Girl singing in even if you sing Gangnam Style on the ukulele. What to sing? Thus the term "Sing-Song Girls" came about.