It's not about efficiency at all. I want to know that I can get up and leave whenever I want to. This makes me feel much more comfortable and relaxed. "also

It's not about efficiency at all. I want to know that I can get up and leave whenever I want to. This makes me feel much more comfortable and relaxed. "also has the benefit of giving time to patrons to relax and chat while they finish up a meal." I am confused about this. I rarely get the tab while I am still eating.