Friday & Saturday, March 20 & 21: Heiva I Honolulu. Hawai`i's largest and best Tahitian dance competition with local, mainland and international competitors. Unique Polynesian handicrafts and food available for purchase make it a must for locals and visitors alike. The dancing, drumming and music set it apart from the regular stereotype Waikiki show. These groups, drummers, and soloists are competing for authenticity, poise, stage presence and endurance in Tahitian cultural arts. Waikiki Shell, 2805 Monsarrat Ave., Honolulu. 9 a.m.…