It’s at least one passholder per room according to the rules. YMMV whether you can get away with multiple rooms for one passholder, when I was there recently staying on a passholder rate at Aventura - and checking in at Portofino for a ghost suite to get express for my group of 6 - no one ever checked to see if I was actually a passholder. But they could, I personally wouldn’t risk it.