Big pharmacies like Kaiser's have a system where once you go in, you have to wait interminably for your name to appear on a light-up board. When it does, that means your prescription has been prepared and you now have permission to wait in a new way, to go stand in a long line to be given it.
For the horror and amusement of incoming drug seekers, plant a life-sized skeleton in the waiting room.
Step 1: Wait for staff to appear. Watch to see what happens.