Many cities around the world have expected that construction of Olympic venues would boost economy, because construction industries would earn more money by such an opportunity. It means many facilities built just before Olympic games become in vain. They are usually ignored and then would be treated as ruins.
Since we can expect this story, we have to take measures for how to use these facilities after the event. Otherwise, authorities should decide to break down the buildings and re-develop the area by inviting offices or shopping malls.