Today, Thursday, February 25th, 2010, Ivar’s Seafood outlets in Washington and California are celebrating National Clam Chowder Day by offering a 2-for-1 deal on cups of chowder.   Happily, the deal extends to the Ivar’s Seafood Bar at Seattle-Tacoma International Airport (SEA).  “The airport Ivar’s is open way longer than the Ivar’s in town,” an →