The Double Wide Grill is an eclectic eatery on Carson Street in Pittsburgh's South Side Flats. Apart from its wonderful culinary offerings, it also offers a fantastic example of usability for this week's post (and, no, not all of these posts will be inspired by restaurants, I promise!).
Displayed above are the doors to the Double Wide Grill's kitchen. To control the flow of traffic through the doors, they have chosen to use the words "Yes" and "No" rather than the commonly used "In" and "Out" or "Enter" and "Exit". The use of the words "Yes" and "No" connote a far stronger and more easily understood message than "In" and "Out". Our brains would naturally have to process if we are outside of the kitchen or inside the restaurant. Rather, the mind immediately associates with "No"; therefore, it is more likely that the users will select "Yes", the correct door. The use of "Yes" and "No" shows that the Double Wide Grill took into account the human interaction with the doors (usability) when designing the restaurant.
-RTK