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.
There are night busses in my city, and there are loads of wild stories but maybe my favorite is this wholesome one:
So friends were returning from pub with guitars (some jam night) and didn’t want to stop. Get to the bus and started playing again, few stops another guy with guitar gets on, joins them… So the trip went like all the people singing, players hops on and of on their stops and everyone have a good time returning from pubs.
When we did something like that on few hour long train ride some German girls really liked it, they didn’t understand a word but they clapped after each song.
That sounds like other people would probably find it either delightful or obnoxious with little in between.