Originally Posted by gardener
Just a clarification of Points Scrounger's post -
It is one dine per airline FFP per month.
So, if you and your wife both belong to, for instance, United Mileage Plus and US Airways Dividend Miles, you can score 4 dines per month by rotating your charges to CC linked to those 4 FF accounts. (Not two dines as a literal interpretation of the "one dine per airline would imply).
You can go to the same "once-per-month" restaurant for
each FFP you are registered for. I have 4 cards, each registered to a separate FFP dining program. This way, at a "once-per-month" location, I can use my separate cards for the UA, US, DL and NW programs - 4 times total during the month!
Or if you want to consolidate all miles into 1 FFP, you could do as
bob12403 suggested - buy a gift card on your 1st visit!
You would earn miles on that 1st "once-per-month" visit, and use the balance during the remainder of the month.