If you're looking for an all you can eat sushi restaurant, check out Aoi. A small, not-to-trendy restaurant, Aoi sits almost in the middle of downtown Philadelphia. Keep in mind that they only have this "special" during a certain time window at night (which i dont remember off hand), so make sure you know when that is before you go. At an affordable price ($20-25) you can fill yourself on pieces of sushi, sashimi and nigiri. Also, you're only allowed a certain amount of points at a time, so choose wisely. Finally, their sushi might not be the best, but if you're going to stuff your face full of it, go to Aoi.