Not a random place, but a nice story: When I was testing my Zolo Liberty+, I saw another guy on the subway using it. He was really feeling whatever music he was listening to. It was the early days, the very first week, so he was probably an super early bird like myself. I expected him to open his eyes at some point, but I left the subway before him.
I did saw an Anker Soundcore, first edition by the look of it, attached to a bike in the Tour de l'île last year, blasting some hip hop to a small cloud of cyclists. Not my personal choice of music, but the sound was loud and clear.