Possible Clues:

• Like some washers or arcade games
• Running quarterly, for short?
• Like many laundromat machines and arcade games
• Washer that runs on quarters, say
• Slotted for payment
• Requiring change, briefly
• Pinball machine, e.g.
• Like pinball and laundry machines, briefly
• Like some washing machines
• Self-svc. laundry