Just a stone's throw from 'The 3 Kings Monument' is a street with a handful of bars in a row, all featuring live music every evening. None are too large, somewhat cocktail bar-ish, and not too touristy. Chiang Mai has a conservatory, so bands made up of students often play here, naturally bringing along their own student crowd.
These are the names: Mahoree, Den of Drinks, Charoendee, and Wingman.