$3 sushi rolls, beer & saki at Happy Hour. Between 4-7 is a great deal but the sushi is not as amazing as Mottsu. Plan to go after 7pm to try the regularly priced rolls to see if there's a difference.
Come here during happy hour between 4 and 7pm, and the sushi roll is only $3 each. It's hard to find good but cheap sushi in Manhattan. Try the fried ice-cream too.