Self-hosted · no accounts · guests install nothing
Put a phone next to the speaker and a QR code on the fridge. Everyone searches, adds and votes from their own phone, and the queue reorders itself around what the room actually wants.
Hosting needs the Android app. A browser is refused playback for most commercial music, so the player runs on an Android device by the speaker.
Open this on the Android device
Scan it with the phone or tablet that will sit by the speaker. That device runs the player and the host controls; this one cannot.