WASHINGTON — One of the women who accused the Republican presidential candidate Herman Cain of sexual harassment while working for him at the National Restaurant Association in the late 1990s complained that the workplace turned hostile after she alleged that he made advances toward her during a work-related outing, several people familiar with her account at the time said in interviews. The advances were said to have taken place during a festive night in which Mr. Cain and several younger staff members drank until late in the evening, and his flirty banter with the woman crossed over into propositions that...