Margie Stevens earned the right to teach Jazzercise Nov. 9 by completing an intense two-day workshop and performing a letter-perfect audition. After submitting adequate references and putting in long hours of practice, Stevens recently participated in a rigorous workshop in Vallejo, sponsored by the Franchise Programs and Services Department of Jazzercise Inc. She was required to learn approximately 10 Jazzercise routines for the audition; pass a written exam on basic anatomy, exercise physiology and nutrition; learn Jazzercise business practices; and become certified to perform cardiopulmonary resuscitation (CPR). Each 60-minute high-energy Jazzercise class includes a warm up, aerobic segment, muscle toning …