
I'm no expert,
but in the context of a lunch INVITATION...
The Big Bang Theory Season 1, Episode 1

vicious as you like,
all but sending you a bloody INVITATION.
Game of Thrones Season 1, Episode 6

It was customary for me
to extend him an INVITATION.
Game of Thrones Season 2, Episode 5

What INVITATION?
The Big Bang Theory Season 2, Episode 9

Do you accept
the King's INVITATION?
Vikings Season 1, Episode 7