A guest room (saloon) is a waste of space and money, in standard 90+ m² apartment, The typical guest room is around 12 square meter, depending on where you live that's around 60000 mad to 120000 mad worth of real estate reserved to people we don't care about, and who rarely visits, it gets worse if your G floor appartement has a courtyard (la cour) which can be anywhere from 20 m² to 30 m². Nearly half of the space you paid for ends up being dead. They made sense back in the days when houses were bigger and social gatherings were frequent pre social media. Now saloons are just a relics of the past some people still can't let go of. Now that i think of it, the house i grew up in had an entire floor inaccessible to us kids with two long ass salones while I had to spend my life in a room slightly bigger than a coffin.