Long time lurker, first time user!
NoOk have opened their second cafe in Sydney CBD and they are offering $2 coffees through the Hey You app (android and iOS). Requires download and sign up if you don't have an account. Google Play iTunes Store Windows Phone
They use the Seamless blend from Sensory Lab which is really nice for milk coffees
48 Hunter St
Enjoy!
Hey you and Skip usually have these $2 coffee offers.. But they are difficult to find them unless you receive a pamphlet.