Have your husband start the charcoal on the beach grill while you cook rice pilaf with almonds, and steam broccoli. And find a pie server that will serve as a spatula and wash it. (It's not your beach house after all, you're making do with what's around. Good thing you're a bad girl who knows how to improvise).
Have your husband place a nice slab of salmon on tin foil. Top with thinly sliced lemon and olive oil; wrap. Grill. He'll talk to neighbors for a while, then flip.
Have your husband place tuna steaks on grill, and shrimp skewers around outside edges of grill. By the time he gets upstairs, grabs the pie server/spatula and turn around, it will be time to head downstairs and flip both the tuna steaks and the shrimp.
Serve up the fresh fish with rice and lettuce, steamed broccoli on the side. Delicious.