“Dance to the Rhythm Tour” arrives at Iridium as a live rock/pop set led by guitarist and singer Ana Popovic (also billed as Ana Popović). The program centers on groove-driven songs and extended guitar lines, framed in the close, listening-room setting the venue is known for. For New York, the significance is less about premiere history than continuity: Iridium’s stage has long served as a bridge between guitar tradition and contemporary pop structures. The playing favors clarity over spectacle, and that restraint carries the night.