At the party the lift was hung between two trees and served till the next morning. After the party, the children were allowed to take their gondola lights home (always important for kids). Back home we hung the lift between my oldest daughter's bedroom window and her tree-house in the garden. Some of her friends came over, bringing their light gondolas from the party, and attached them again, making the fun last even longer.
There seem to be not many instructables on gondola lifts or cable cars. A nice one is http://www.instructables.com/id/Miniature-Moving-Gondola/. However, in this instructable I show how you can make simple and cheap pulley wheels out of plastic dinner plates, that allow for an easy, yet stable attachment of the gondolas. I illustrate the gondolas we made with a kind of joule thief flashlights shining down on reflective aluminium foil shapes, but of course you can make your own. You can use led throwies as even simpler party lights or go for gondolas transporting messages, small toys or modelled after the real thing. The gondolas we made weighed a good 50g each, but I guess the construction is suitable for gondola's up to about 100g or more, depending on the number of gondolas and the span of the lift.