I am not sure who you mean by 'guests'?
If you are saying clients then most certainly they would only see certain parts of the house.
However, close friends and relatives would get to see more.
In addition, a guest staying at the house would see more than another person of equal status who only ever visits the house and leaves.
Clients would be limited to the official side of the house where the owner would need to display their wealth and influence.
A friend who isn't a client might also be limited to the same areas but a really close friend might see some of the less formal areas.
Obviously relatives would get the chance to see some of the informal areas, but so would some very close friends.
Remember that these people were also people and like us, depending on who the guest is, depends on what parts of the house we take them to see.
Being more aware of the different types of areas of the house and the types of people who visited is important but not necessarily cut and dried about who would be able to visit where.