My comments are a bit dated ( maybe three years old ).
I was a Platinum at the time and booked a cash and points room at the time. That’s U$ cash. Well the hotel decided they’d convert my $60 to Euro at the usurious hotel rate to which I objected at check out. I ultimately got the cash back through US customer service.
The lounge was closed on Saturday / Sunday and not noted anywhere on the web site on a Sunday. If I had known I would have stayed at the Hyatt CDG. The lounge was open Monday AM and had an ample cold buffet.