For all its protestations of humility — it’s just a little “corner store” — the Corner Store has, in short order, become basically out of reach for the average diner. Good luck popping in. By 5 p.m. on a recent night, a line had formed down West Broadway filled with people hoping for the mere possibility of cancellations or no-shows, and when I’d tried my luck around 5:15 p.m. on a Sunday evening not long before, a polite but firm security guard stationed at the door informed...