College roommate, second attempt at graduate school, failed again.

His dad called: "Son, don't take it anymore, come back."
He cried: "Dad, I'll try one more time, the last time."
His dad was silent for a moment: "Your mom said if you take it again, she'll turn your room into a mahjong room."
He: "...Then where will I live?"
His dad: "At school, of course, aren't you going to take the graduate exam?"
He: "What about the mahjong table?"
His dad: "Put it on your bed."