I think it's a great idea. Would be pretty fun. Get a conference room or whatever and run some trains on a huge screen or something awesome.
IF this ever happened, location wise I'd have to say Chicago. The railhub of railhubs, and though being a Wisconsinite, I sometimes despise the place, it makes sense. It is right smack dab in the middle more or less and there's plenty going on railroad wise. I think KCS is the only Class 1 that doesn't have trackage in and/or around the city. Plenty to do, in a decent location for most people to get to. Amtrak could even getcha there

. But that's just my opinion on a subject that would be very difficult to actually organize/execute.