Clock watcher

What’s the point of playing if every twenty minutes someones checking to see what time it is?  My sessions rarely stop on time because I don’t see the point of cutting something off and ruining the flow. Slaves, please allow a thirty minute window on top of the time you’re scheduled for so everything goes smoothly.  Sometimes sessions end early because everything went well.  Please don’t get offended if we didn’t use up the full amount of time.