Where I used to work, we had very generous and generally non-picky travel rules, except for the "no in-room movies" rule. I suppose it was to prevent the company paying for porn, but this was never directly stated. Many of the regular travelers were upset by this, as after a day of work and being in a city by yourself, sometimes that's the best option. But the company would fully reimburse you if you went down to the lobby bar and ran a tab for a few hours, which many of them did. The "no in-room movies" rule eventually got removed.