So you won the lottery or got a long-awaited raise, and the dough is burning a hole in your pocket. The high-toned but unsnobbish Capital Grille is the best place in town to act like Diamond Jim Brady. You can even set a dollar bill aflame to light a cigar, and no one will say a word. Start by ordering a bottle of good bubbly (Cuvee Dom Perignon 1993 is a bargain at $225) and shrimp cocktail, followed by the 24-ounce porterhouse. All the side dishes are à la carte, including the $3.95 baked potato. But aren't you worth it? For the more tight-fisted diner, here's a tip: There's no sin in sharing. In fact, managing partner Mary Simpson would rather see customers splitting an order of the spicy, pan-fried calamari (which can feed four) and the luscious Wedge salad (which easily feeds two) than going to a budget steak house and getting much less bang for the buck. And if a customer wants to spend a life's savings on a dinner that starts with the $15.95 baby- lobster appetizer and ends with the $6.95 chocolate-hazelnut cake? "That would be fine, too," Simpson says, laughing.