Wrap outside bottom and sides of a 9 inch springform pan with heavy-duty aluminum foil. Coat bottom of pan with cooking spray; sprinkle with chocolate wafer cookie crumbs, and set aside. Combine sugar and next 4 ingredients in a bowl. Beat at medium speed of an electric mixer until smooth. Add eggs, 1 at a time; beat well after each addition.
Pour half of cheese mixture into a bowl; add melted chocolate, stirring until well blended. Spoon alternating mounds of plain and chocolate cheese mixtures into prepared pan; swirl with a knife to create a marbled effect. Place pan in a large shallow pan; add hot water to larger pan to a depth of 1 inch. Bake at 325° F. for 45 minutes; remove from oven. Remove springform pan.