When planning a surf and turf dinner party, it is important to consider how much food to serve per person.  Generally, you should plan for 3/4 of a pound of meat per person, as well as 2 - 4 ounces of seafood.  In the case of surf and turf, this could mean 3/4 of a pound of steak and 2-4 ounces of shrimp or lobster.  Depending on the size and appetite of your guests, you may want to adjust these amounts accordingly.  Additionally, it is recommended that you serve at least one or two additional sides, such as roasted potatoes, grilled vegetables, or a salad, to complete the meal.