Fight Clubs create a context for gospel-centered discipleship - studying the Scriptures to find your sin, fight your sin and trust your Savior. Here's a snapshot of one way to take notes for Fight Club during your personal study:
[37:1] Fret not yourself because of evildoers; be not envious of wrongdoers!  For they will soon fade like the grass and wither like the green herb.  Trust in the LORD, and do good; dwell in the land and befriend faithfulness.  Delight yourself in the LORD, and he will give you the desires of your heart.  Commit your way to the LORD; trust in him, and he will act.  He will bring forth your righteousness as the light, and your justice as the noonday.
- Psalm 37:1-6 (ESV)
Main Point: Continue to do what is right even when you are being wronged.
Sin Exposed: Stress and envy that doing the right thing is not creating the expected successful outcome that comes to those who cut corners and take advantage of others.
Sin Fought: Continue to do the right thing - empowered by a deepening delight and trust in the God who always does the right thing in his perfect timing. 'Delight in him and he will give what you delight in'
Savior Found: In Hebrews 12:2, we're told to '[look] to Jesus, the founder and perfecter of our faith, who for the joy that was set before him endured the cross, despising the shame, and is seated at the right hand of the throne of God.' No one suffered more injustice than Jesus and yet he pressed forward because of his joy-filled trust that God would vindicate him. For me, this not only serves as an example but creates the confidence to move forward - if God can come through against those odds than surely my situation is not too much for him to handle.