If everyone is standing in their positions without doing anything, it means that a TV show is about to start. You could check the starting times by tapping on the Share icon.
We would like to remark that EVERY AREA is relevant in your game. Take in mind that your workers could arrive late to their TV sets if they suffer some delay in the make-up room, or if they wait too long to be attended in the reception, for example. The break room should be also a place where your camerapeople or TV presenters could lose some valuable time... Stay alert!
Check if the dressing room assigned to a specific character is too far from the make-up room and the set, and try to reassign it to a closer one so the presenter can get to the set earlier.
Also, keep an eye on the cleaning room and the maintenance room so your workers could keep your installations properly cleaned and repaired.
However, even if all the areas are fully upgraded, small delays could happen. Be patient!