Basically every chain grocery store does this at least once a week as well. I remember them trying to get me to do it when I worked for one while in college. Acted like it was such a great opportunity to get an extra buck an hour, which I quickly refused.
Yeah, most of our stores close by 10, with a couple open to until 2. I worked as a night custodian for a time and hit the one 24/7 store sometimes on the way home.