Love is in the air but more importantly, so is butter. Although Valentine's Day is fast approaching, don't worry. There is still time to book a romantic evening. Restaurants all over town have special menus to mark the occasion. Below are menu samplings from several local restaurants: Paragary's, 1408 28th St., and Cosmo Cafe, 1000 K St., are having a special weekend prix fixe menu in honor of Valentine's Day. Paragay's menu will include an appetizer, entree and dessert. Entree choices are petrale sole or beef short ribs braised in red wine. Cosmo also will offer three courses, with an entree choice of roasted lamb loin chop or grilled Hawaiian swordfish. After your meal at Cosmo, keep t