Kurt Vile & The Violators are one of the hottest bands around with their old-soul, acoustic sound and lyrics that are all “air, weightless, bodyless, but grounded in convincing authenticity, in the best version of singer songwriter upcycling,” according to fellow musician Kim Gordon, of Sonic Youth.

Fresh off the Sasquatch Music Festival in the Gorge this month, Kurt Vile is coming to Portland to play an intimate concert for 800 at Revolution Hall. Hearts are throbbing.

The admission?

Free. You’ve just got to do some good.

Specifically — anyone who does three hours of community service with a local nonprofit can earn his or her way into the concert, thanks to a new Portland-based movement called Wave PDX.

Led by “Grimm” consulting producer Steve Oster, who’s lived in Portland since 1999, it’s intended as a way to bring a social element, and fun, to community service work — to make it a celebration with a big payoff.

Just last Thursday, dozens of young people met at the Rebuilding Center on North Mississippi Street to put in a few service hours, fueled by energy from a live DJ and a trip to a brewpub afterward. They logged their hours into the Wave PDX website (http://www.WavePDX.org), which tracks their hours for the Kurt Vile concert and other events.

Interested? Oster answered some questions for the Tribune about how this all works: