Movie and Concert Memory Jar - cute idea. Something cute for me to start a collection jar since I'm always on the move, doing activities and seeing new stuff. I can put many stuffs into a jar of memories.
photo display for a party - double sided so they can spin a little. / you could do these right beside the hanging table. Maybe use streamers in your colors to hang from the exposed trusses to kind of add color and a block from the big empty space.