I have had odd issues with unenclosed "rooms" (21 patient treatment areas, separated by a partial 2 foot wall and an actual curtain). I had separated each patient exam area individually, then add the final corridor room and number. When I went to my electrical model, I couldn't pick up the separated rooms at all.
You can, however, separate the spaces as you have stated. It is also what I needed to do. VERY tedious... and my space tag didn't pick up the patient area names or numbers.