I'm leading a field trip for a bunch of college students to NYC. We're chartering a bus and will arrive in the city around 11am; I'm planning on taking them to museums on the Upper East Side all day long, so I want to ensure that they have a real lunch beforehand. I was thinking about taking them to the Chelsea Market, but I'm open to other food hall/food court alternatives. I'd like for there to be a variety of different things to choose from; there should also be some inexpensive dining options. Many thanks!