I've been invited to an avoidance?

What's an avoidance?


In this joke avoidance mean may be avoid dance.
but, it is not really funny.

Ohhh,,,yeah,,, I soooooo much want to go there too, bet I'll be the best dancer EVER,,,LOL :)

is this difference between Englis and America language?
i didn't understand :(

oppss, it's difficult to understand the profound meaning of jokes....