While we have little patience for New Yorkers' pizza snobbery, it's true that S.F. pizza sometimes goes astray from the ideal. Marcello's, in the Castro, has a lot going for it: big slices, a great crust, odd toppings like muffaletta or linguiça, beer and wine, and cute eye candy. It's open until 2 a.m. on Friday and Saturday (and 1 a.m. the rest of the week), and does enough business that it's still churning out pies when you stumble out of the bar. A $4.20 slice of tomato-and-mushroom is a perfect vegetarian late-night meal.