"Ban Ban Shop serves fusion-y food across the street from Columbia's campus, so it's a good option for a casual, under-$15 lunch. Try the satisfying sandwich with tender five-spice roasted pork, or the shrimp maki rolls that are large enough that they taste like an excellent deal. This is the type of place you can linger in for a while—the last time we were here there was a college-aged couple who had clearly finished their Vietnamese iced coffee a long, long time ago. " - willa moore, sonal shah, neha talreja, will hartman