That's exactly the situation we faced last week trying to access "Altitude" in London's Millbank Tower for a UK Management Conference for CPM. After 90 minutes of sweet talking the security guards we were allowed up in the passenger lifts and managed to get things ready for rehearsals at 08:30. (No wonder I've got no hair!!)
Anyway, things were calm and the venue looked great for the Gala Dinner too
The view from the 29th floor