When I first started escorting in Las Vegas a thousand years ago, I would leave my phone on 24 hrs because of the nature of the town. More than a few times that paid off with late night or early morning calls, & some interesting meetings. As I got older & more (ahem) seasoned, I changed my ads to read "phone goes off at 2am."
Now..living in Palm Springs, I usually clock out around midnight. When I wake up to a voice mail that came in after 2am, it's usually a bullet ducked!