McDonalds has become more a convertible panic room for their employees than a burger joint in certain areas.
There was a 7-11 outside each of the gates at Homestead AFB, back in the ‘80s. Some of us found ourselves there at night, and the place was locked, and dark. But, if you looked closely, you could see a flickering light behind thr beer, in the cooler. We learned that if we beat on the door long enough, the cashier would poke his head out. He’d come give us the once-over...a few obvious GIs...and unlock the door for us. We’d make our purcheses, he’d lock the door behind us, and go back in the cooler.