Go up to the one you know, and flat out say it.
Then be completely chill.
For the one you don't know well...
Ignore them, @Scout_Fox was right. So long as you DO NOT interact with this person, things should be fine.
Delicious.
Like the souls of innocents...
Person who thought I was funny, so good, I guess...
Too late chump...
Normal sharder. So generally chill person.