Clubs have always had DJs. They would bring their records and spin. More recently, DJs have been been using laptops to create live music from prerecorded loops and samples, and they often do so at Open Air, a bar on my block in the East Village.

Now, we are beginning to see VJs performing live mixing of video to accompany the music. Thanks to Apple technology, all you need is two PowerBook laptops, Final Cut Pro, a mixing panel and lots of footage. The best practitioners of this new art are playing in the East Village at an event called Lapdance, on July 18.