I go fairly often to Sabay, on Broadway near 76th Street. It's relatively cheap (which is important for me a lot of the time), it's comfortable, it can be entertaining sometimes (because of the Thai rock and dance videos that they're always showing) and the food isn't bad at all. Service is also pretty fast if you need takeout in a hurry (easy to grab something there before you jump on the train, which is down the street).