Step 1: Tentatively knock on the door with your left hand while whispering "I'm just here for the free coffee."
Step 2: Wait for 5-10 minutes for someone to pick up the phone and ask you to leave.
Step 3: Repeat step 1 and 2 until the sun goes down.
Step 4: Surrender your dignity and accept a participation trophy.
Step 5: Return home with a sense of accomplishment and a strong stomachache.
Continue to Step 6: The thrilling conclusion!