If you haven’t heard, Alias (76 Clinton Street) is hosting a “Sunday Summer Crab Boil.” For $25 you get to feast on Maryland crabs, corn on the cob, potato salad and corn bread. They started the messy affair last weekend. The deal is even better if you’re a member of the Zip Card local discount program. You get 20% off plus 10% off the rest of your check. To make a reservation, click here or call 212 505 5011. If you’re interested in getting your own Zip Card, there’s more information here.