Huh?
That looked like a general invitation to a public event that had been distributed to some portion of the public by e-mail. Had it been for someone at Ames, or a NASA facility, I believe you would have had no problem with it.
What makes it off-limits simply because it's a place you happen to work at?
And realistically, how many Zoners, or anyone else who reads this board, do you think will show up?