Ever sat in a train and thought 'why are all these people so boring/noisy/(insert other character traits here)??'.
I propose that train carriages be itemised/categorised the world over. Wherever you get on a train, you know you'll be sitting with like-minded people.
The standard could go something
First carriage: All the power-user professionals with laptop who like to just sit and write corporate procedures. Give this carriage more power points for them to charge up when necessary, and maybe some hubs for networking. Let them get off first as they're the most anxious to get to work!
2nd carriage: School kids. (and only school kids, need I say more)
3rd carriage: Newspaper/reading section. Larger seats for larger newspapers. Quiet is mandatory on this carriage.
4th carriage: All the oldies. Oldy type music going, hearing impaired aids, extra railings etc...Maybe a tour guide at the front with interesting trivia and sightseeing tips on the journey.
Last carriage: Party animals. Put a bar on, some couches around, vending machines, music etc...maybe even a small dance floor.
Each carriage should have appropriate decoration for its occupants. All other carriages (assuming there are enough carriages) should be left to the folk who dont know where they belong yet.
I've spent years on trains, why are we all so unorganised!!??