A method for enhancing income when renting a vehicle having a driver seat and at least one passenger seat, wherein a driver sits in the driver seat to operate the vehicle, includes renting the vehicle to a user for a predetermined number of occupants of the vehicle including a driver, wherein, the predetermined number of occupants including the driver is less than the number of seats in the vehicle. Locking out a number of seats in the vehicle that is in excess of the predetermined number of occupants including the driver. Releasing the vehicle to the user for authorized use of the vehicle having occupants in the driver seat and any unlocked passenger seats. In one embodiment, locking out a number of passenger seats includes fixing a seat lock-out assembly across a body support of at least one of said number of passenger seats to discourage unauthorized use of said at least one passenger seat.