Restaurant.com has vouchers on sale again today- get $25 for just $2 with promo code: SPOON.
Typically most restaurants will require a $35 minimum to use the certificates- so you can expect to pay $10 or so after your voucher for a $35 meal.
Also they will automatically add on the gratuity of 18% so if that upsets you, you might want to pass on this sale.
Just check the fine print on the restaurant you select but overall I usually get very good feedback about these offers!
Head over to Restaurant.com to have a look.