Noun
a bedroom that is kept for the use of guests
Source: WordNetBrewer says with a laugh — she leads the way through a guestroom just past the fireplace. Source: Internet
Several private rooms at the Yuquan Mountain branch are decorated into the style of Mao's guestroom, study and tearoom. Source: Internet
Gift yourself with a new mattress, and upgrade the guestroom with one that’s half off. Source: Internet