MADONNA has been making the rounds with Jesus Luz. The lovebirds arrived the other night with Jessica Seinfeld at the Bourgeois Pig on East Seventh Street in a Cadillac Escalade. Anderson Cooper rolled up on his bicycle and joined them. A few nights later, they were at Standard Grill with “Truth or Dare” director Alek Keshishian. Madge was seen tying a red string around Luz’s wrist. Later, she took her Brazilian boy-toy to gay bar Easternbloc on East Sixth Street “hoping to get him some deejay experience in her old ‘hood,” said a source.