Crowding
Well, then there is the possibility of having a lounge fill up with frequent fliers or paid lounge members who depart in Economy or even on competing, non-allied airlines. I have heard a Flying Blue customer complaining that this is the case in Schiphol, so the elite is the non-status passengers who occupy airy and quiet departure lounges, while the frequent fliers are lured to crowded lounges with a few free snacks and drinks...