Figured I would make a new thread, as the old thread says it is only good till April 1st, and does not give correct rate code. Rates are good until end of May, 2014.
The Hilton Garden Inn at Central Park is having a promotional rate for their opening special (through Travelzoo). Rates are between $129-$159 for a King and $159-$189 for two double beds.
Put code 2669220 in the corporate box to see those rates (click on drop down box that says 'more options, and then click on 'add special rate codes'). This sale will end any day now, and reservations are fully cancelable, so book NOW!