Find an almost empty room

Tonks walks down the length of the train, checking each room she comes across. Most train cars are full, especially near the front, but as she works her way towards the end she finds that her potential targets are more and more isolated in their rooms. Eventually, Tonks’ eyes sparkle, gleaming with vibrant shades of every color as she stares hungrily through one of the glass doors, and she puts a hand on her chosen target’s door.