The folks at DC9 like The Republic Tigers. The Kansas City quintet were at the 9th Street club in April, and the club liked them so much they brought them back for Friday’s Liberation Dance Party. The band, which appeared on The Late Show with David Letterman the day before, plays atmospheric, sometimes epic indie rock with electronic flourishes. Their great single, “Buildings and Mountains”, sounds a bit like Travis or Grandaddy, while “Feelin’ the…