I assume a web app (on a main domain for the platform or a self hosted kind on the pub's sub domain) should do fine. Guests can create accounts, vote on songs o

I assume a web app (on a main domain for the platform or a self hosted kind on the pub's sub domain) should do fine. Guests can create accounts, vote on songs or use as guest (maybe with their table number) and even try to order online or participate in a draw/give feedback or share moments/songs with their friends which will attract more traffic to the bar.