Given that the exact same question is the current top post but for driving instead of transit, I feel this question was needed.
My answer: I saw some guys hooking up a Raclette Grill to the outlet in an otherwise empty German intercity rail waggon. They had it unpacked in one of these 4 person seats with a small table. No idea if that could work or if draws too much power from the board net. I just headed on to the next waggon.
My father from the greater New York area still refuses to ride our local light rail here in Seattle because he doesn’t understand that it’s actually a really low key experience, with clean, safe, fairly quiet cars (for the most part), and relatively efficient service at low prices and all that. He thinks it’s all like the New York Subway or NJ Transit.
He’s going on that light rail next time he’s here.