I would lean more towards doing a luncheon for them. and if you like to cook, you can do a pasta lunch (spaghetti, meatballs, salads, garlic bread) and have a variety of desserts.
I personally am not a fan at all of $5 giftcards, but that is just me personally.
I personally am not a fan at all of $5 giftcards, but that is just me personally.