500 great songs over 10 nights

You could call it the world’s biggest open-mike night. Except the one going on in Atlanta this week will last 10 nights. When it’s all over, 500 bands and solo artists -- representing genres as varied as rock, rap and bluegrass -- will have performed, in order, each of the 500 greatest songs of all time, as ranked by Rolling Stone magazine three years ago.

It’s a songfest aimed at raising money for camps serving children with special needs.

More than 1,500 performers are expected to file on and off the single stage at Smith’s Olde Bar by the time they’ve worked their way from No. 500, “More Than a Feeling” by Boston, to No. 1, Bob Dylan’s “Like a Rolling Stone.”