Do you use RedBox? I do, and we love getting FREE DVD rentals!
You can get a Free 1-night Rental with coupon code BREAKROOM at the actual Kiosk. I have the appfor my iPhone so if I am driving home and get the urge to rent a movie, I can see which closest Red Box has the movie I am would like to watch.
I have never had an issue using these codes. You will still need to enter your Credit Card during check-out. You should not be charged unless the movie is late (return is required by 8p the day after your rental).