Montréal's Fairmount Bagel Bakery (on Fairmount Avenue, of course) is a nonstop, 24x7x365 operation.
I've visited this place on weekdays, weekends, late at night, the middle of the afternoon, you name it... there is ALWAYS someone rolling bagels accompanied by someone putting them in or taking them out of the wood-fired oven.
If you visit, look carefully at the front door. You'll notice that there isn't a lock nor even a latch on the door; there's no way to secure the place. I suppose that if you operate 24x7x365 there's just no need to lock up, ever!