Could be wrong but I thought it was a vacuum in a tube system, not a string and pulley one.
They had an entrance with automatic opening glass sliding doors, where you had to stand on a rubber mat to open them. One of the first. Great fun when you were a kid.
I had a traumatic experience at Christmas. Walking up to Santa's Grotto, I spotted Santa sitting in the Grotto and another Santa sneaking out of the rear. Two Santa's!!!!
Must have been a change of shift.