There's not much in the way of night life in Chiang Rai ....so in the evenings a lot of people head to the night market . It was good food ....and it's pretty cheap. And as a bonus there's music. Lots to see and buy and a large variety of handicrafts. opens daily after sundown. It can be found between the bus station and Pahonyothin Road.
In Chiang Rai the market is much smaller and less touristy than its larger counterpart in Chiang Mai - meaning it's much harder to bargain - prices are quite fair anyway. There are three stages with shows of traditional dance and music - for free but not very good - and a huge food court and market. Yuu just buy something from a food stall and then go sit down at one of the many tables.
Dress Code: dressed is enough