The rotation kept falling apart, so KaraokeFlow exists.
Paper slips get lost, the same three people sing five times, and the KJ spends the night managing a list instead of running the room. Now singers scan a QR code, request from their phone, and a round-robin keeps it fair. Other karaoke products sell the same phone-request idea. Ours came from needing it at our own show, which is why the parts nobody demos — declines, latecomers, key changes — actually work.