P.F. Chang's: Free Lettuce Wraps Coupon from Facebook

I worked at P.F. Changs for a few years while I was in college and my favorite things to get were the lettuce wraps and the shrimp dumplings - yummy!  I still like these but don't go as often as I would like. 

If you go to the P.F. Chang's Facebook page and like them to receive a coupon good for free lettuce wraps with any other purchase. 

I tried to do this earlier today and the site was jammed but it looks like they got it fixed now.  There's no rush because the offer is good all month long so plan a lunch with the girls or an evening with the spouse without kids :)