If there’s one thing the Boston dining scene is sorely lacking, it’s late-night dining options. And we mean really late night, as in 24 hours a day. Fortunately, word comes that the South Street Diner, the Leather District’s most popular greasy spoon, has expanded its hours from nearly 24/7 to actually 24/7, meaning you can now get that Monte Cristo anytime you feel like it. Bonus! Did you know you can reserve tables for three or more from 1–5 AM? All you have to do is call (617-350-0028).