Aren’t most events at hotels “secretive”? Our company all hands certainly isn’t a public event. It’s seems reasonable that defense companies may not always want their events to be public and in newspapers

Advertised? No. Secretive? No.

In all the company events and such that I've been to at hotels and casinos, there's usually signs in the lobby, "Welcome X", or at least on the screens or signs by conference room doors telling you exactly who is there (I will not pretend, and know, that this is not always the case. But it's generally fairly trivial to figure these things out.)