A bedroom was a room in which a person or people slept. The Doctor's TARDIS had a number of bedrooms, the disused ones being stored in the TARDIS holding ring. According to one account, the Eighth Doctor deleted all of his previous companions' bedrooms after a Blitzen fish was released from Susan's bedroom. (AUDIO: Relative Dimensions)
Charlotte Pollard said that C'rizz's bedroom was tidier than her own. (AUDIO: Absolution)
Soon after regeneration, the Twelfth Doctor was greatly confused by the existence of bedrooms, struggling to see a purpose in them. (TV: Deep Breath)