Neither of you is going to the show tonight, ____?
Should it be isn't he/she? I think the fact that neither of you takes the third-person singular verb is means that a third-person question tag ought to be used. But it sounds so awfully strange. So does the second-person alternative aren't you? You can trivially replace all question tags with right? in informal speech, but aside from that, what is the appropriate question tag to use in such sentences?
EDIT: Oh right, I should have realized that. How careless of me. But can you explain why you would use "are you" instead of "isn't he/she", even though "neither of you" is a third-person reference?