A meal at this good-natured, rough-hewn fish shack with a hyper-nautical theme is an absolute Cape Cod tradition for some people. There's a giant blackboard menu (order up front, and food is brought to you); a big, breezy screened-in porch in which to eat; and red-checked tablecloths. Go for the Nantucket Bucket—a pound of whole-belly Monomoy steamers, a pound of native mussels, and corn on the cob served in a bucket. Also consider the rich and creamy lobster bisque or the complete lobster-in-the-rough dinner. Bring your own libations, and if you need to kill time (the lines are sometimes daunting), stop inside Moby's Cargo, the bustling gift shop next door.