Why do we always find out about breeding grounds for prostitution only after they shut down:

The Indian state of Maharashtra says it is closing its numerous dance bars because they are a breeding ground for crime and prostitution. Only the state capital, Mumbai (Bombay) has been spared for now - pending further inquiries. The state has about 1,500 dance bars employing more than 100,000 women who mostly dance Bollywood numbers. [BBC News]

BBC News: Maharashtra shuts dance-girl bars