In “Parks and Recreation,” Tom Haverford used a Roomba to play music around his house.
Tom’s customized device was nicknamed DJ Roomba: he attached an MP3 player to a Roomba robotic vacuum, turning a household cleaner into a roaming sound system. The gag fits Tom’s tendency to rebrand ordinary objects as fashionable lifestyle accessories.
DJ Roomba first appears in the season-two episode “Sweetums,” when Tom’s friends help him move. The vacuum rolls through the house while playing music, and Tom treats it like a genuine DJ. The joke returns several times, including at Leslie and Ben’s wedding, where DJ Roomba provides music at City Hall.
A common mix-up is answering “DJ Roomba,” which is the character’s nickname, rather than “Roomba,” the robotic appliance named in the question. Roomba is a brand of autonomous robotic vacuum cleaners made by iRobot; Tom’s innovation was the attached music player, not a special musical model.