The sign for "New Orleans" strikes the thumb-side of an "O" hand twice against the palm of the non-dominant flat-hand.
(Model: Byron Cantrell)
Dr. Bill's Notes:
I do the whole sign a bit lower down. (Not so near my face.) This sign appears to have some roots in the sign for NEW, but the two signs ("new" and "New Orleans") are now quite different. Interestingly enough, the "New Orleans" sign reminds me somewhat of the sign for KILL / murder. Maybe you could use that as a memory aid. (Perhaps there are lots of murders in New Orleans?)
Notes: