Best hole in the wall restaurants in N.O?

I'd say Johnny's steak house offf of Napolean, Frankie and Johnny's or Rocky and Carlo's.
That'd be Charlie's--which is actually supposed to reopen.

Oh, and I have a friend that loves Restaurant Mandich on St. Claude. But, I've never been in it so I don't know if it's a hole and I don't know if it survived Katrina (I'm sure it was under water). I also always kind of like College Inn, but it's on the border line of being a hole.
Greatest. Ever.

But done.