I recall seeing an interview with the company that provides most hotel PPV movies, where they stated that the average viewing time for their films was 3 minutes.
OK, we're getting into a whole weird area here, but since you brought it up first...
You know how you can order PPV over your cable box? Well, whenever you order a movie, it's not only sent not only to your cable box, but every single cable box that shares the same loop (approximately 500 boxes or so). This is usually not a big deal as your cable company-provided cable box will dutifully ignore any PPV coming over the wire that you didn't order.
But...if you have a newer TV with "QAM" (digital cable-ready) you can plug the cable directly into the TV, do the channel search and-surprise, surprise! You can see your neighbor's PPVs, even if they haven't ordered just and they're just scrolling through the menus. You can't control if they stop, pause, rewind or FF so you're at their mercy, which is kinda neat in and of itself. Anyway, my buddy and I figured this out in early 2007, when Houston was still Time Warner territory, and we enjoyed "eavesdropping" on neighbors' PPV that way. Saw a lot of Entourage episodes and many movies in HD for free (There is no personal information transmitted, so it's not like we could tell who was ordering them).
One day my friend was half-way watching Mission Impossible 3 on "Neighborvision" when the movie paused and flipped over to an adult film...for about 5 minutes, then went back to MI:3. Mildly disconcerting! Then Comcast came in and changed all the PPV stuff around, and I don't think that works anymore. I myself moved back to Time Warner country but I haven't tried the trick in my new location.