Guess Ennis was too busy worrying that other people were checking HIM out...there's no indication, anywhere, that Ennis ever gave a thought to another guy. Kinda weird..not one thought...
I thought Jack danced pretty well...and how would Leshawn know anyway, before she danced with him? (unless they'd gone out together before, which they apparently hadn't--it was all because of Randall's pickup breaking down that the two couples were together to begin with). Compare Jack's dancing to Ennis's...