Ok, I got the answer as to why the Cove Bar was closed for a few days a couple of weeks ago...
The majority of Bartenders and other staff all put in requests to take time off, and all of it was approved. They all headed off to Las Vegas for a deserved weekend of fun and relaxation.
So there was very little regular staff available to open the bar, though a few remaining CM's were willing to do what they could to staff the location.
So instead of finding other available bartenders that could come over and work the Cove Bar for the weekend from other locations in the Resort, the Ariel's Grotto/Cove Bar Managers decided to just close the bar for a busy Summer Weekend instead.
So that is the story, and keeping it simple is the probably the best.