2 occurrences in 2 dictionaries
Reference: Guest-chamber
Easton
the spare room on the upper floor of an Eastern dwelling (Mr 14:14; Lu 22:11). In Lu 2:7 the word is translated "inn" (q.v.).
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Morish
It is recorded that in Jerusalem at the time of the feasts, when so many persons came from distant places, those living in the city who were able, gave up a room for the use of any that came to worship, hence the term 'guest-chamber.' The disciples found such a room ready, furnished and prepared, where the Lord kept the last Passover with His disciples. Mr 14:14; Lu 22:11.