Color Code Your Keys. Could be a quick an easy craft on the days we need something quick -- could have people know before hand to bring their keys if they wanted. but then again people might not want to color code their keys?
For the office? Paint pipe a bright metallic and the wood a washed color? V Scaffolding Boards and Dark Steel Pipe Wall Mounted and Floor Standing Industrial Chic Shelving/Bookcase - Bespoke Urban FurnitureDesign