Room 2-3 nights per week

I shall be starting work in Brentwood in June and will be working 2/3 days per week there and the rest at home. I am therefore looking for a room when working in Brentwood so ordinarily just for 2 nights per week and therefore hopefully not too disruptive for somebody who has a spare room but doesn’t want a full time lodger. There might be some weeks I am not there at all and the odd week where I am staying over 3 nights.