Have you tried Arby’s new Reuben Sandwich yet? If not, or if you’re itching for another one, take a friend in with you this weekend to Arby’s for a B1G1 Free Reuben Sandwich deal. Just go to Arby’s Facebook page and take the St. Patty’s Quiz to be able to print your coupon. This coupon is valid 3/16-3/18 only.