Karaoke is a fun party activity for all ages, and you can rent a machine for as little as $50 for an entire weekend. Even if you prefer to keep your singing voice confined to the privacy of your bathroom shower, it's always fun to watch other party guests grab the mic and croon -- or shame -- the latest pop song. Karaoke rental prices depend on size and capability. Machines can accommodate anything from a teenager's small birthday party to large weddings or charity events and may include anywhere from 350 to 15,000 songs. Of course, a bigger songbook means the rental will come with a heftier price tag, but quality karaoke machines can be purchased for around $300, so consider making an investment if you plan to promote sing-alongs at future events.