This can be achieved by running the Accommodation Daily Booking Chart.
(There is also the facility of the Weekly Booking Chart (however this is an additional module)
This will give you a list of families showing each room with the number of beds in use and available day by day (week by week) for a given period.
There is a helpsheet (no.HS028) which covers this. Please click on the following link to view or download helpsheet – HS028 Accommodation – Daily Booking Chart.doc