Nearly 100 nighclubs across West Yorkshire were subjected to random inspections in a safety crackdown.
Officers found faulty fire alarms and blocked exits during the swoop on nightspots.
In January, 233 people were killed in Santa Maria, Brazil, when a fire swept through a nightclub.
A spokesman for West Yorkshire Fire and Rescue Service said the crackdown had been held in an attempt to prevent a similar disaster from.
Fire protection manager, Chris Kemp, who led the operation, said it was ‘pleasing’ to see the majority of nightclubs taking safety seriously.
“We did, however, find various issues during our inspections, which included faulty fire alarms and blocked exits which have resulted in the serving of two prohibition notices and two enforcement notices,” he said.
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