While I don't think coffee will really count as "food" (it's just boiled up beans) it may attract animals, particularly those that may be partially habituated to humans and equate the smell with other food.

Me? pack 'em out.. unless you're where fires are appropriate in which case burn 'em.

Better yet go get some Starbucks VIA italian roast.. I don't bother with grounds anymore on the trail since discovering this stuff.. (and I normally grind fresh at home)