In Dead Island 2, the Laundry Room Locker key is one of the many keys you need to find to open different lockers and crates.
In Dead Island 2, the Laundry Room key is a key item required to unlock a locker in the Halperin Hotel. As the name suggests, this locker is in the laundry room. This Key is dropped by a specific zombie whom you have to kill.
The Laundry Room locker is located on the second floor of the Halperin Hotel. To get to the locker, you must go upstairs and enter the hallway in the hotel. You must find the pink neon sign and head inside the laundry room from there.