Joking aside, they seemed reasonably happy standing. Although the shot of the man above does look a little melancholy. Unless he was just thinking about his next meal of jellied eels!
They got off at the same stop as me at Holborn and when they were going up the stairs, it was clear people now noticed them. I heard a number people pointing them out to their friends, like a breed of exotic bird had flown into the Underground. Exiting at Holborn, I managed to grab a blurry shot of them on the escalators.
They certainly added a nice bit of sparkly East End glamour to the Tube.