I like the idea, it would be useful to discover new coffee shops and subscribe to shops to receive updates, specials, etc. You should definitely build in a loyalty system that will allow vendors to rewards the regular customers.

What do you think marketing your app/network as an exclusive Sydney coffee club?

I'm curious what business model you have and how you have taken in to account the transaction fees and that they will be quite high relative to the low price of a cup of coffee?

I am from South Africa and I'm also a coffee addict! Keep it up man!