To dream of Jay Leno talk show and attending in means that you like hanging out with your friends. The Jay Leno could also indicate some person in your waking life who reminds you of this celebrity. The dream could also mean that you watch too many TV, therefore you keep dreaming of it. If you watched the show before you went to bed, this dream doesnt have any meaning.
Read more about dreaming of Jay Leno in other dream meanings interpretations.