Well... Last time I was in Brisbane, during December, I noticed how every store, mall and food court in the shopping area had AC on AND the outer doors wide open.
Let's clap it: That. Is. Stupid!
I was told that it was considered a bad custom to shut the outer doors - it might scare customers away when a door is closed.
I agree that it is a pretty stupid practice, but from a geocultural point of view it is understandable. I live in Sweden where it is too cold to keep the doors open 8 months of the year. Restaurants and grocery stores generally have their open hours printed on the doors in large text, and most other stores are generally open from 10-19. One way to go could be a commerce agreement to keep doors closed. If every store starts doing it at the same time, they won't have to worry about losing customers and they will save money on electricity. I realise such things are easier said than done, though.