Sacred Haven of Debauchery

We went to a quiet industrial area near the railway tracks to have a few drinks, just like we used to in our younger days. Suddenly, the headlights of a parked car nearby turned on, but that's okay, we stood there quietly, drinking on some pipes. After a couple of minutes, the lights went off. Then I noticed a "police" sticker on the car. Either it was a timid officer who didn't want to deal with us, or he was waiting for treasure hunters.
That's the story.