An elderly customer sat a couple of tables away stood up to close the door, but was interrupted by one of the servers who said that they weren't allowed to close the door since they would get in big trouble from head office if the door was closed - apparently the shop is less inviting with the door closed. But we have got the heater above the door on - said the server helpfully.
Having finished my coffee and walking back to my car I noted that just about every shop I passed had the door open (presumably with a big heater above the door).
Are we now as a nation to stupid to open shop doors? I hate to think how much energy we could save by mandating that shop doors had to remain shut except when someone is actually passing though them.