Tristan Dobek
Tristan Dobek voted up Walt O'Reagun's answer

That "guest" dynamic is entirely dependent on your family.

Some families, the "guest" has control of the TV ... Other families, the "guest" is stuck watching whatever the hosts normally watch.

The best solution, is to provide the "guest" with their own entertainment options, separate from the family.  EG: A TV in the guest room.