Little old couples. That instead of eating the nice meal you bought them 45 minutes before the end of your shift, sit and read the paper as it cools. And then, once it's cool, instead of eating it at a speed appropriate for somebody that is, I would think, human, they chew with all of the enthusiasm of a tree sloth on muscle relaxants in order, one could guess, to preserve the perfection and location of dentures. And that don't leave until 45 minutes after you should have been home.
I also assign people that think they have musical talent and choose to share that thought with the neighborhood at far more decibels than strictly necessary with the aid of an amp and electric guitar.
