Iraq Arms Quest Uncovers a Zest for Drink
Customers at Tiger Eye liquor store in Baghdad react jokingly to visit by United Nations weapons inspectors to three gin factories outside city in search of nuclear bombs; drinking alcohol in public has been banned since government's 1996 faith campaign, bars and pubs have been closed, Iraqis now drink at home or furtively in restaurants and nightclubs but liquor shop business is booming; photos (M)