I’m going to vote for fire suppression (sprinklers). That is a brick building and may pre-date the code now requiring sprinklers.
If I were half empty, I’d do about everything I could to make it more attractive.
Of course, you could pop into the manager’s/rental office and ask “What’s up Doc?”
The use of plastic had damned well better mean “temporary” and it had better mean that those pipes are the highest priority for a good soaking in event of fire - you don’t want your sprinkler supply lines melting.
And, if some creep with a battery-powered saw goes after them…
The power of asking a question. I highly recommend people do it more often - you are allowed to politely ask people pretty much anything, if they can’t tell you they can’t tell you.
More times than not people are happy to talk about their work and their lives.