St. Petersburg, FL (May 12, 2016) Want to learn exciting defense techniques while alleviating stress and anxiety? Bay Vista Recreation Center, 7000 4th Street S. offers Tai Chi Yang Style class Tuesday 7:30 to 8:30 p.m. $24/mo. $7/session. Classes begin Tuesday, June 7 through July 26. For information on over 100 ongoing classes offered by city of St. Petersburg Parks and Recreation, see www.stpeteparksrec.org or call 727-893-7124.