That's certainly a factor but it's not too hard to plan ahead and bring or buy a book. Or work on a laptop. >people don’t normally have to sit around for hours

That's certainly a factor but it's not too hard to plan ahead and bring or buy a book. Or work on a laptop. >people don’t normally have to sit around for hours just waiting Waiting in lines, waiting in traffic, waiting for buses. There's still plenty of waiting. And when people have free time (weekends, etc.) Yes they often drink.