Seven construction workers from the World Trade Center site were caught drinking on the job Friday.
The Port Authority said undercover detectives from their office observed the workers drinking alcohol at the Raccoon Lodge on Warren Street.
The crew left the bar and were headed back to work when they were stopped.
Investigators confiscated their IDs and banned them from the site.
A Port Authority spokeswoman said they will not tolerate reckless and dangerous behavior.
Subcontractors will decide whether to fire the seven construction workers.
Three others were caught drinking during lunch on July 19 and were also banned.