There are plenty of good reasons to head to the Floridian in the wee hours of the morning, not the least of which is that it's the best time to actually get in the door. Lunchtime and weekend mornings find the eclectically decorated eatery with a line out the door and onto the sidewalk. This is a good sign that the food is, if not gourmet, at least well thought of by legions of locals. So when those postparty hunger pangs hit, grab a table in the dining room decorated with plenty of Marilyn Monroe and Beatles memorabilia, and order up. The sandwiches are stacked with meat and condiments; the milkshakes are thick; and the breakfasts are home-cooking good. And at 4 a.m., shakes and eggs always hit the spot.