conveyor belt sushi
with the plates that are color-coded for price
Not sure if they are still open, but you could give them a call:
Genki sushi 9 E 46TH St
between madison and 5th avenue, (212) 983-5018
Haru Broadway 205 W 43rd St
43rd and Broadway
Just an FYI .. Itsu restaurant on the corner of Draycott Ave. and Walton St. near the South Ken tube station in London is far and away better than Yo Sushi ... or at least it used to be.
There is/was a place in the World Financial Center. Don't know its name and can't vouch for quality, but the belt is there! It's in an open food court area just north of the boat basin. I don't think it's open weekends.