Ponyboy has to be home at a certain time, as Darry says. Ponyboy fell asleep and had gotten home at 2 Am. Dally was very mad and argued with Ponyboy and then Darry had slapped him. During this Sodapop was backing Ponyboy up so he wouldn't be in trouble. After Ponyboy got slapped he ran away.
In chapter one the author had explained Johnny's life. Johnny's dad would beat him up and would have marks from his dad. Johnny's dad is yelling at Johnny and may hurt him. They are in his bedroom yelling at one another. This is why Johnny is never home.
Dally always flirts with girls, and likes doing bad things. Dally is talking to these two girls named Cherry and Marcia. He wants to offered a drink to them when they didn't want anything from him because they thought he was a bad person.