I was thinking of having the train station threads on all of the boards. It's a public thread (kinda) so anyone can go there, buy tickets, wait, potentially interact with others then go to another train station when they have 'caught' the 'train'. After that, they go to another train station thread in a different place, disembark and go to wherever they need to go, maybe meet up with someone else. As Octavia said, worse that could happen is that people simply skip it. Just my two bits