Music Bands Are Now Locking Up Your Cell Phones

On a cool, Manhattan night, DJ Walton, who helps manage Alicia Keys, steps outside the Highline Ballroom to tell the guy at the door who, exactly, he may allow to bring a cellphone into the singer's sold-out gig. The list is very short.

On a cool, Manhattan night, DJ Walton, who helps manage Alicia Keys, steps outside the Highline Ballroom to tell the guy at the door who, exactly, he may allow to bring a cellphone into the singer's sold-out gig. The list is very short.