Woah! That doesn't sound good. I wonder if it was temporary whilst building works were carried out to an area of the lounge, perhaps?
I was suprised when flying domestically from LAS - JFK last year in F that even AA doesn't have a lounge there... Used my Amex card to get into a Delta lounge, I think, from memory...
But seriously - all that space in the desert - surely McCarran Int has space to offer airlines for more lounges?