Did it not occur to you that many people don't just eat a meal, step out of their front door and onto a waiting train? Maybe they had to leave hone at 6am, travel half an hour to a connecting train stationm sit on a cramped rush hour commutor train with standing room only, then wait at the mainline station for an hour or so for their express train on which they had booked a comfortable table seat a month in advance knowing they could actually get chance to eat in comfort. Unless of course one of the other four people sitting at the table has brought a laptop and intends banging on the keys for the 2.5 hour journey. now that is annoying.