Catering to the Marina District's DINK (double income, no kids) crowd, Pluto's combines assembly-line efficiency with high quality. The result is cheap, fresh fare: huge salads with a dozen choices of toppings; oven-roasted poultry and grilled meats (the flank steak is great); sandwiches; and a wide array of sides like crispy garlic potato rings, seasonal veggies, and barbecued chicken wings. Pluto's serves teas, sodas, bottled brews, and Napa wines, as well as homemade desserts. The ordering system is bewildering to newcomers; grab a checklist, then hand it to the servers who check off your order and relay it to the cashier. Seating is limited during the rush, but the turnover is fairly fast. A second location is at 627 Irving St., at Eighth Avenue (tel. 415/753-8867).