We are currently working out our FTE's for a 30 storey office building (Core and Shell project)that includes a small area designated as amenity. At this point we are calling it a tenant lounge and conference facility, but we are unsure what it will actually end up being used for. It likely will not be a regularly occupied space and when used most of the users will be tenants. As a consequence I am not sure how to figure out the FTE's for this space. Should I use a general office FTE or does it make more sense to assign a transient number to it instead (since guests of the tenants could use this space) and, if so, how do I determine what value to use to calculate the number of transients?