They usually have all kinds of problems and nobody to share them with because everyone around them is a stranger. So, they end up reading decades-old magazines and grumbling to themselves about the time they are wasting and what they'd rather be doing. This is an excellent opportunity to offer them one of your books. Introduce yourself and offer them something to read. Get them into a conversation about themselves and they'll feel better.
People love to talk about themselves.
All they usually need is someone who will pay attention. Listen to them. Tell them they are free to take the book home with them. Let them know that you really care about them. This is a good time to talk about Jesus.