Since Bruce Lee was brought up, this seems an opportune time to mention another inscription I've discovered.
This one was in the hallway leading to the loo at a club:

BRCE LVV S NNSYPNSY -CN

Scholars I've consulted are divided on the correct interpretation of this phrase but I believe that this engraving marks the spot where a Ninja dared suggest to Chuck Norris that Bruce Lee could kick his ass.
Related evidence such as some police tape, a blood stained black boot with separated toe & a guitar pick were found in a nearby cupboard.
Some believe these are merely relics of later Ninja activity due to the proximity to babes at the bar & because the police tape is of a type whose first known use is after Chuck Norris.
However if Chuck Norris was around the bar hanging out with babes & killing Ninjas, the police most likely will have needed to order substantial new stocks of police tape.
It is therefore quite possible that this period was in fact the driver of evolution to the new type of police tape