Looking at it again, it looks like the middle part of the bridge will be able to rise up and down making the green room level with the stage ( if you look in the 2nd pic 12 points quoted, you can see a gap in the path nearest to the camera, as well as the edge of the stage in the distance, so the bridge is in it's lowest position. In the 1st picture, the bridge is missing as it is covered by audience members.
And Fluke, presumably they can turn the spiral lights 'off' for the performances that really don't want it?