“Um that’s Cherub,” a mom says to a dad as both walk by the Kiddie Limits trail pushing a stroller. She’s mildly dismissive. Neither stick around.The Miller Lite stage is nestled just behind them and Nashville’s most-buzzed, punk-tinged electro pop duo is sweating behind them. Febreze synths, dirty black jeans, gnarly Vice City boat music, assorted curse words. It’s slick soul with tinges of the usual dance pop suspects–Chromeo vocoders, Ghostland Observatory-esque frontman gyrating–but with a wink toward boat shoes and party-barge jams. It’s part Huey Lewis, rolled-up-jacket-sleeves posturing.The undercurrent, the vitality, is that these are hard-living dudes that transparently sing about occasional substance abuse.“This is that disco shake that makes you feel alive that makes you forget,” goes the least nihilist and most family friendly hook.The duo is managed by Craig Fruin, Lenny Kravitz’s manager, and their set doubled as lobbying for a bigger stage next year. It’s a safe bet given the pair’s easily summoned adrenaline rushes.“This place has been nothing but love for us,” singer Jordan Kelley said after running down his series of strong Austin gigs.Previously he was shirtless and yelling unhinged, slowed-down, post-Screw R&B into his mic. There were engagement theatrics wherein bassist Jason Huber greeted fans at the border, well below his stage.“This is so cool. This is the coolest thing I’ve ever been to,” a sublime, student-age kid said with absurd earnestness.Cherub’s music is packaged to land. Drummer Nick Curtis was Cherub’s producer and now tours behind sounds he’s helped mold. By the time the band closed down its set with 2012’s “Doses and Mimosas” assorted band buddies crowded the stage to dance, play tambourine, sing about champagne and cocaine.But the cover of Calvin Harris’s of “Feel So Close” fleshed out via dance rock moved most hands in the air. Someone waved a blown up photo of Oprah.