Which is exactly why we have to make it easier for people to form and join unions everywhere.
Unions are ripe to be used as instruments for abuse.
This was a requirement having to do with the location, I am not sure about the specifics (if it was a city thing or if the building owner had entered into such an agreement) but I'd like to have a better understanding. On the face of it, it does seem absurd.
The future will hasten the demise of human labor, it's economic inevitability.
It does require the union to have the upper hand in the first place in order to get a company management to sign a union contract with restrictions like that.
However, for this particular story, it makes no sense, because the union only has leverage with their employer, not with the big name companies that have chosen their employer as the provider of the service. The big name companies would just switch to a new provider if they didn't like what was happening.