Santas are Coming to Town
This group of passengers looks like they are either coming back from or on their way to a SantaCon event. SantaCon is an annual pub crawl where everyone dresses up as Santa Clause. You may have seen something like this before, as these SantaCon parties are known to travel by public transportation.
Even if you don’t celebrate Christmas, you may as well join the fun on the Saturday in December when SantaCon takes place. During SantaCon, the one who’s dressed up in a hoodie and jeans that isn’t participating is the weird one standing out. Santa costumes were the regular attire for the day, so all these passengers actually look extremely normal.