Space Planning in Revit.
I created a series of adaptive components that represented corridors loaded with rooms - these could be hotel rooms or healthcare facilities.
Using the adaptive points, it is possible to stretch and move the hotel wings around very quickly and easily; it gives you warnings if the corridors get too long; and at the same time it maintains a schedule of room types and numbers.
RTC Australasia, Wollongong (just outside Sydney) - 24-26 May 2012
RTC USA, Atlanta, Georgia - 28-30 June 2012