Well, you could do it in front of the press corps with people you've known for 40 years, and have it memorialized for eternity on Youtube:
Happens all the time. You just hope the person doesn't realize that the long drawn-out "Heyyyyyyy .... " is the sound of you, desperately trying to remember their name.
And of course, you remember it five minutes into the conversation, so you have to make it a point at the end to say their name, just so they know you
do know who they are. No, really, I remembered your name right from the get-go!