Quite classy club with several floors. The main floor is huge and features local pop bands and gathers lots of local enthusiasts. When they’re done, you can enjoy some nice enough house music.
You can also go crazy on the podiums all night long in the second floor (smaller and usually not really crowded) who displays electronic music til usually very late.
Downside: if you’re a foreigner (if you have black or white skin, no matter how long you’ve been living in Chiang Mai) you have to pay 300bht as an entrance fee (which can be exchanged with drinks inside, though).