EVERY venue should have some kind of licence to operate as a place of entertainment. Those permits will have conditions amongst which will be the fire standards, among which will be standards for fire retardance for everything. If a council inspector calls (yes they do) that inspector can pull the licence to be a place of entertainment. I've seen it happen once in Leicester Square, the fire inspector turned up during the early evening and found things that didn't comply and shut the venue down. It took them 18 months to get the work done because the freeholder was a Church, the building was Listed and no-one wanted to work in a no vehicles, no parking location. A venue licence is issues after inspection and will be renewed almost for ever. BUT if the licence is lost the building works must make the building up to the new standards, which will be EXPENSIVE.