Award-winning country music trio Rascal Flatts – frontman Gary LeVox, guitarist Joe Don Rooney and keyboardist Jay DeMarcus – are trading their history-making “Vegas Riot!” mini-residency at the Joint in the Hard Rock Hotel one year ago for “Rhythm & Roots,” their mini-run beginning tonight and continuing through March 5 at the off-Strip music venue. “We want to perform something different for fans who’ve seen us before,” Rooney said.