The monthly talks help by the Northern Group in Chiang Mai are Chiang Mai's principal intellectual fare. I've only attended one, by Niels Mulder, discoursing on his scandalous and unpublishable life as a young anthropologist in Bangkok during the 1960s.
The talks are held on the second Tuesday of each month at the Alliance Française across the street from the L'Ecole d'Extreme Orient in Chiang Mai. The history of group began way back in 1972 with the short-lived Northern Thai Society modeled along the lines of the Siam Society. The current group began in 1984. There are synopses of the talks in the Meeting Diary. There is a nice summary of the presentation on Champa by Michael Vickery:
"Introduction to the history and significance of Champa"
A talk by Michael Vickery
254th meeting - Tuesday 9th November 2004