As Orange is the New Black has made its return in Season 3, I was jsut wondering what "real" jail is  like.

I know in Orange the prison is all female, but I would like to hear about both.

How much time did you serve?
Is the food that bad?
Does rape still happen?
Is it necessary to join a  gang?

Are there any truths from the show? How does the shows prison differ from real prison?