I have (among other things) free disco rest ticked as a restore for automatic mana recovery. It uses the first 4 rests as needed, but never uses any more. I have 7 free rests (1 disco nap, 2 disco power nap, 1 executive narcolepsy, 3 unconscious collective) and mafia recognises this in daily deeds panel. I presume it's the UC rests that aren't being used, as I'm pretty sure that before I had that familiar it used to autouse up to 4.