Menchanko Tei has ramen as well as udon and other noodles. During lunch, they only serve noodles, onigiri (rice balls wrapped in seaweed/nori) and oden. At dinner they also serve small tapas type dishes as well -- the type of thing you would eat while drinking. All of it is really tasty and reasonably priced. They also have a bottle keep for sake, if you are into drinking regularly. The bottles of sake are reasonably priced too. The staff is also very friendly. You often see Japanese expats here -- sometimes eating alone at the counter area.
This restaurant also has another location on 55th street and they have a sister restaurant that specializes in katsu.