American Heart Assoc. and American Red Cross are the two organizations that offer CPR certifications. They should have info on where classes are being held locally. Many towns offer CPR classes through their Parks and Recs Dept, Fire, Police or Ambulance. Call AHA or Red Cross - they should be able to point you in the right direction since they are the organizations that ultimately grant you the CPR card.
BTW if you enjoy it, take a CPR instructor class - it can be a flexible way to earn a little cash.