Chiang Rai is not Bangkok, it is a quiet provincial capital, but it is not a dead deal. Like everywhere in Thailand are Chiang Rai offers many options to eat out, and that may not always be Thai. Tritonis Cafe & Restaurant specializes in Mederitane cuisine, The Bistro at Chiang Rai Condotel European cuisine and Moommai Thai restaurant has Thai food on the menu. Restaurants more than enough which of course the vast majority of Thais is oriented.
Just go have a beer that's ofcourse also possible, for example in Baan Don Sod Jazz & Blues Studio or The C Word Bar.
Sights are also largely, think of the various temples where the famous White Temple, of course, immediately jumps to the eye. But there are also several museums such as the Hill tribe Museum and the more art-oriented Art Bridge Chiang Rai.
Enjoy nature for example in Doi Mae Salong, Khun Korn Waterfall of Pha Soet Hot Spring and of course there are in the area to do multiple terkkings.
In Chiang Rai, there is a cinema where mostly English-language films are on the program.