The Laundry Room is a location in Luigi's Mansion 3. It is found in Twisted Suites, located on the eleventh floor of The Last Resort. It is south of the Lounge.
If Luigi uses the Dark-Light Device on the washing machine, it will reveal tons fish and a Golden Goob.
After Nikki, Lindsey, & Ginny scrambled the door ways, the laundry will not be visited until Luigi captures the magicians.