I can understand offering some sort of holiday entertainment for half an hour or so, but it seems that the happy smiley marketeers who persuaded management and leadership that this was a good idea failed to put themselves in the customers’ shoes in terms of considering how it might actually go over (space, volume, duration, etc)
there must have been a rehearsal (in terms of setup and sound checks) at some point, but that was probably at 3am, and unsurprisingly at that hour nobody thought about the hundreds of passengers and employees who would be in the space (and coming and going) during the actual performance
another instance of good intent but poor execution