The Wal-Marts near me used to be open 24 hours a day. Then only one of them was, and the rest closed at midnight or something. Then that one started closing at 2AM or so and the rest moved back to 11PM. Now they all close at 11PM. Despite the fact that, when they were open late, there were many people there all the time.

And the fact that they stayed open late was the only thing going for them. (I personally like the way they stock by carting entire pallets of things out to the floor and leaving them there, in the middle of the aisles, for, apparently, days, while the stockboys circle-jerk or something, I guess.) I haven't been to one in several years.