Dwell time is the whole game
A guest mid-quiz does not leave between rounds. A guest waiting to hear whether their song made the queue orders one more. Neither is a dramatic effect on any single table, and both are significant across a full room over a full night — which is how hospitality margins have always worked.
It removes the reason quiz nights get cancelled
Venues rarely stop running a quiz because guests didn't like it. They stop because the host was unreliable, the marking took all evening, or the staffing cost outgrew the extra covers. Take the compère, the sheets and the marking out and the format survives contact with a normal week.
It takes a repeated small negative off your staff
Being asked for a song mid-service and having to say no is a minor unpleasantness that happens dozens of times a shift. Structuring it means the answer is visible and impersonal, and the interaction stops being an interruption to someone carrying four plates.
Guest photography is free marketing you're currently discarding
The images that make people want to visit a bar are of it full, at night, with people enjoying themselves. Those photographs already exist in quantity — they're just in other people's phones. Collecting them costs one QR code on the table.
It's designed to be a fixture, not an event
Most event technology is priced and shaped around a one-off. Hospitality needs the same thing every week for a year. That's what the business and multi-site packages exist to cover.