There are some restrictions, but on restaurant.com, $25 gift certificates can be had to many local restaurants (West/Putnam/Rockland/NJ/CT) for $10, or $10 gift certificates for $3, along with other denominations. Many have a minimum $35 purchase, along with no Fri/Sat nights.
I am eyeing John Michael's up in North Salem, which I know some CHers spoke highly of... they have $100 gift certificates for $40, $75 for $30, and other denominations.
Here's my search from Ossining: http://www.restaurant.com/rdc_site.ne...
Search also from the main page from your zip, http://www.restaurant.com