The idea is to have a "Social/Party Mode". This mode would allow multiple users to add songs to the queue and upvote or downvote on the current queue. This would be perfect for social gatherings, such as parties, where everyone can contribute to the music selection without having to rely on just one person to control the playlist.
Queue Management: The app should keep track of the songs added to the queue and display them on bigger screens, with a way to add songs to queue.
Up/Down Voting: Everyone should be able to upvote or downvote on the current queues songs, and it should display the number of votes for each song that move them up or down accordingly.
Accidental Skipping Prevention: The app should prevent accidental skipping of the current song if someone tries to add a song but doesn't add it to the queue. The only way to change music should be the queue.
Hide/Lock settings and not important menus and buttons.
I think it would be enough to have it just on one "shared" device. Like a tablet with the app open for anyone to go to and add songs to the queue. But maybe even a way to connect via other devices (qr-code / link) to ensure only one up/down vote per person? I guess thats a lot more work tough.