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.
Not my story but my dad’s. He was in London for work and was using the public transit. I don’t know if it’s like this anywhere else but uk buses throw you around a lot. So a group of American tourists got on, with their typical “having a conversation with a stranger” behaviour, something unacceptable in the uk (/hj). The bus starts and the Americans just go flying and the entire bus of brits are just laughing at them.