McCormick and Schmick's Seafood Restaurants is offering $20 dinner certificates. You must make reservation online to take advantage of this offer. Hurry the offer expires on Sept 30, 2008.
Costco stores sells 2 $50 M&S gift cards for $79.99 which can further your savings.
Lastly, if you dine at M&S regularly, you may want to consider joining its frequent dining program.