There are times when the clean/simple Apple MacBook power adapters are just not the best size/orientation. The picture above pretty much sums it up. You can’t use the standard MacBook power adapter in some outlets.
This Ten One Design MacBook power adapter wall-plug, the Blockhead Side-Facing Plug ($19.95), works with all MacBook power adapters. It even works with the 10w & 12w iPad power adapter as well.