Did you ever wonder why there are locks on the doors of a 7-Eleven? If they are open 24 hours a day, 365 days a year the doors would never need to be locked Who has the keys to these doors? Do the managers carry around keys that are never used? And why is it called 7-Eleven, why not 7-TwentyFour for 7 days a week, 24 hours a day? Ah ha! I found the answer at the official web site of 7-Eleven:

"The company's first convenience outlets were known as Tote'm stores since customers "toted" away their purchases, and some even sported genuine Alaskan totem poles in front. In 1946, Tote'm became 7-Eleven to reflect the stores' new, extended hours - 7 a.m. until 11 p.m., seven days a week."

It doesn't say anything about the locks though.