Using Toilet as a Traffic Controller

As you all know, customers can approach from the back of a chair/toilet and sit on it; then, they can leave from the front side of the chair/toilet. Therefore, it is possible to use toilets as a "gate" for controlling some entry and exit traffics. See:



As a result, people can only enter from the west side of my restaurant. Although some customers do not use toilets after dining, I can at least force those who need toilets to leave on the east side.