I took advantage of the free rides on Trimet on New Year's Eve, and spent the evening riding around town. Two streetcars and three MAX trains, from Good Sam to the South Waterfront, and from Beaverton to Gateway.
It was a mixed group. Some were quiet, some were sleeping even. Some were on their way to a party, while others were already on their way home. And some were partying on board the train. (There is such a thing as a coffin-shaped cellphone case.)