THE ANGEL TOUR arrives at S.O.B.’s as a live Hip-Hop/R&B bill, with Iyla among the featured performers. The night is built around voice-forward R&B and beat-driven writing, staged in a room with deep ties to New York’s rap and R&B lineage. S.O.B.’s has long functioned as a testing ground for artists crossing from internet attention to in-person audiences. One clear detail: the venue’s close quarters make small shifts in phrasing and rhythm register as much as production does.