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.
Two, both on the same bus ride:
Old guy comes on with a cart and starts selling cotton candy, with surprising success. 50 cents, and the rest of the ride people are just all enjoying cotton candy in violation of no eating rules (especially sticky stuff).
Girl, probably around 16ish, on a loud phone call with someone in regards to a boyfriend in prison with increasingly more depressing and dire details as the ride goes on except a random moment where she talked about Fortnite. We’re talking drugs, pregnancy, other women, and Fortnite.