Also - this Marriott deal of giving lounge access to any UA Premier Gold or higher (which is a lot of people) is making the lounges very crowded. No wonder 1/3 of the hotel is eligible.

On this Denver JW - could be this is independently owned, and the owners are complaining they are not getting enough revenue from food sells. So maybe they wanted Marriott to close the lounge. With Denver being a UA hub, maybe half the guests were Marriott Gold (via UA).