8 years ago, I started work in an office that shared a common men's room with another office on the same floor. The men's room had an outer and an inner door. It was kind of like an airlock. Actually, it was most likely constructed to prevent people wandering outside to get a glance inside. The inner door was really annoying because after you washed your hands, you had to pull on 2 doorknobs to get out, a double contamination. In an attempt to remedy the situation, I went out to Home Depot and bought a large rubber doorstop similar in shape to your block. I propped the inner door open. A few hours later, the doorstop was stolen. That made me very sad and I had to continue opening both doors to enter and exit the men's room for several years after the incident.