Originally Posted by
TWA884
According to the American Airlines Trip Book, which is linked on the
FlyerGuide Wiki, employees, dependents and guests on reduced rate travel, including discounted positive space tickets, are not permitted to use club lounges (pages 20 and 58). The Admirals Clubs are only available to revenue passengers (page 64). Violations of this rule could result in loss of pass privileges.
There's a practical consideration which this rule doesn't address. An employee on a discounted (but not free) ticket can often get into the Admirals Club at his/her base because s/he knows and is friendly the staff. Imagine, do you see of the AAngels saying to a friend, "Sorry, you're not permitted in here." I don't.