The brew bar is usually an offshoot. In most places that have one, you're lucky to see 5% takings through it. The vast majority of Australians either take instant, or milk-based espresso drinks. I think I've stated it somewhere before, it would be a good experiment to see just how viable a "brewed coffee only" establishment is in Sydney or other capital cities. The fitout would be cheap as chips compared to a top-notch specialty coffee outlet with an espresso machine.