By Junko Fujita TOKYO (Reuters) - At the almost empty "Wall Street" bar and restaurant in Tokyo's Kayabacho financial district, three groups of patrons dine quietly at tables separated by partitions. The sedate scene is a far cry from the area's heyday 30 years ago when traders flush from big wins on the nearby Tokyo Stock Exchange routinely crowded the restaurant's bar, downing glasses of premium whiskey. Even though Japanese stocks are scaling giddy heights not seen since the asset inflation bubble of the late 1980s and early 1990s, bars and restaurants in the financial district aren't ...