Civil rights groups will meet in the nation’s capital this week to discuss widespread denial of blacks’ voting rights during the 2000 presidential election. In an event advertised as a “National Emergency Summit,” leaders of the NAACP, the National Urban League, the Southern Christian Leadership Conference, and other groups will meet tomorrow at Howard University to “shape a response to the denial of voting rights” in the November 7th election. Among events mentioned at a related gathering yesterday was a plan by the Rev. Al Sharpton for a shadow inaugural march on January 20, Inauguration Day, to the Supreme Court building in Washington. “This is not over,” Sharpton said yesterday. “George Bush was selected by the judges, not elected by the people.” Several groups, as well as dozens of black members of Congress, have alleged that black voters were kept from the polls in Florida and other states on Election Day, and ballots of others were systematically discarded.