This is an excellent example of awareness training. Awareness is the ability to recognize an environ- ment or circumstance as potentially threatening. It is the skill of placing oneself in a continual position of readiness, both mentally, physically, and environmentally. Training officers beach young recruits that the best place to sit is towards the rear of the restaurant, with one's back to a wall with a clear view of the front door. If something unexpected does happen, such as a robbery, while the officer is in the restaurant forethought has given the officer at least a positional chance to react.
Good fighters are often very careful individuals.
Other examples of daily survival habits include never traveling to work or home from work along the same route, and never carrying objects in your weapon hand. Many of us need to change our outlook on martial arts training. Traditionally, training wasn't confined to the dojo, but with the changes in civilization, the need for martial arts in daily life has lapsed. Awareness training can begin the minute you step out the door in the morning. Wager a free lunch on it.