Inverted Rows - Overhand Grip
No shirt, no shoes, no service time. Don't flare those elbows out. Think of them being tied tightly around your torso. Don't do anything but touch the bar with your lower chest. And keep your body straight throughout. No reason for slouching shoulders or sagging midsections. But since you've committed to taking that next step, there's no reason for any of these to happen.