The other question - and possible idea - could you put up different
promotions in both locations (FB and website) to see which drives more
customers to your door?
Finally - can FB really be used to gauge true fans (with the idea of a
coupon or special) because it is SO viral.
Just a few thoughts...
At some point, I'd like to experiment with a timed offer... such as
"offer is only valid until 4pm"
or a promotion akin to the familiar old radio favorite "For the next 8
callers".