Lunch by the MET
I usually head over to 2nd ave for cheaper food. Taco Taco is good (but a bit of a trek, I personally think it's worth it - their two taco lunch deal is great). Hi Life is fun too and Land (Thai) has a great lunch prix fix menu for something crazy like $10.
1726 2nd Ave, New York, NY 10128
Hey it's an upscale neighborhood, relax and splurge a little and enjoy. You can eat popcorn the next day if you feel like you've got to even it out.
I love E.A.T. It's rather overpriced but every dish I've ever had there is excellent, and they've even improved the bread.
1064 Madison Ave, New York, NY 10028