Due to low passenger volumes and suspended flights, American is closing 11 lounges so far. I expect that number to grow.
There are various state laws that are affecting service in Admirals Clubs. Perhaps the most extreme place you can social distance inside of an airport is in American’s Flagship First Dining. But they’ve had to close it at New York JFK because ‘restaurants’ are required to be closed. Some won’t let you take food with you, others won’t let you eat the food they give you there. And in some places alcohol cannot be served.