Now playing at Union Hall, The Book of Red Flags Live! lands in New York City as a rock/pop stage set built around the idea of warning signs, retold through songs and on-the-spot performance. Featured performers include The Book of Red Flags Live!, Amber, Singletary, Maddy, and Kelly, rotating focus between voices rather than a single front person. In a city where relationship lore and confessional storytelling are part of the local canon, the format reads less like a concert and more like a live document of contemporary dating language. One clear strength is its restraint: it lets the audience connect the patterns.