Some of the area's leading conferences and events can be found at Chiang Mai International and Exhibition Center. Look up its schedule and see if anything is on while you're in town.
This events and conferences venue is in Chang Phueak, but Chiang Mai International and Exhibition Center isn't the only thing to see in the area. If you're up for more sights, Wat Phra That Doi Suthep is worth stopping at as well.