In my EMS days, we'd respond to a stabbing or shooting in the middle of the dance floor at a local nightclub. Everyone was in the bathroom. Saturday night, 400 people in the club, and nobody saw nuffin...Once a week unless the moon was full, then two or three.
Needless to say, the place had a reputation.
We were a volunteer department, and told the management to put out the word that if any of our personnel got injured on a call to that establishment, it would be the last time we responded. They would have to wait an additional 30 minutes or more for the next closest EMS response. We never had a problem, and the police would often enter only after we arrived.
Some 40 years ago, the area either side of Severn Avenue north of I-10 in Metairie, the suburb just west of New Orleans city limits, was called Fat City. It was a warren of jerry-built, barely-legal, probably-not-code-but-who-cares nightspots some of which were owned by guys who knew a guy.
Whenever one of those nightclubs began to lose its appeal and its patrons, they'd suddenly ..... yeah. Urban renewal, Fat City style. Nobody, as I recall, ever got indicted for arson back in those days. It was just business.