Yup, sounds like ConciergeKey. It's not a "secret" program, but it is invitation-only. The next time you are in an AC, look closely at the nametags that the staff wear. Chances are that one or two of them will have badges that say "ConciergeKey" instead of the generic AC logo.
ConciergeKey is designed for people who generate an extraordinary amount of revenue for AA by influencing the purchasing decisions of others (travel managers, CEOs, etc.).
Some non-corporate folks can get CK status as well by virtue of the sheer amount of personal money that they spend on AA each year (such as by buying many full-fare International First class tickets).
Note that CK status is separate from the "VIP" designation that diplomats, politicians, celebrities, etc., receive from AA.