What started as a wild idea among a few Oakhurst denizens is now being called "the largest organic, free-range, crowd-sourced music festival in the state of Georgia," and it all goes down from 2 to 6 p.m. this Sunday. More than 130 bands have signed on for the Decatur neighborhood's inaugural "Porchfest," and they're set to perform hourlong sets on at least that many porches and lawns as part of a music-driven shindig that will encompass one-square mile, officials said Wednesday. The idea was borrowed from a similar hoedown born in Ithaca, N.Y. eight years ago, and the logistics for the local incarnation are being handled by some 500 volunteers. (Street and lot parking is available, but fans of free music are encouraged to walk, bike, Uber, skateboard or take MARTA's Blue Line to the East Lake Station). "This being our first year, we set out with a conscious decision to aim low and start small," said organizer Scott Doyon. "Turns out the community had other plans."