As mentioned, the best way to do this is to use an Equipment schedule, mechanical schedule or similar. That way you are scheduling the family, not rooms. Scheduling a custom parameter from your Revit family is much easier and will give you I think, the outcome you are after. You can schedule by Type Comments, description or any other custom parameter you may wish to create.
Petersen, I would disagree as rooms in the traditional sense, don't move up and down a building. A room is associated with a level. To document finishes, my elevator family has custom parameters for all 4 sides, floor & ceiling. We use the mark or type mark parameter for identification. I simply fill in this information so it populates a schedule.
Again, if you move away from rooms (I would use them simply to identify lift spaces in your documentation plans/sections), this scheduling task is fairly straight forward. Also, don't forget the benefits of having all this data in a typical lift you may use associated with a typical lift schedule in your template/library. Rooms on the other hand are recreated for every project.
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