The contact states all promotional materials that mention the California Science Center are subject to approval, there is no out for a third party. The contract is specific to the event. The promoter of the event is the one responsible for seeing that all third parties involved abide by the contact.
They violated the rental contract, and because of that the event was cancelled
“The promoter of the event is the one responsible for seeing that all third parties involved abide by the contact.”
And where exactly do you find that??? And now I’m going to make an announcement about a future event at the center without submitting it for approval to anyone so now the organizers are going to be in violation of their contract, and the contract should be canceled, Right?