For some affordable and delicious Italian food in a casual setting, check out Broccolino, right around the corner from Barclays Center. The pasta here is delicious and the paninis are also good. It’s a small setting, with long wooden tables instead of individual seating, so you may be a couple of seats down from another group of guests, but the food’s good enough that it shouldn’t be a bother.
Recommend: Gnocchi al Gorgonzola e Noci, Rigatoni Alla Norma
Broccolino: Food Menu (Hover over “Menu” for the different menus)