While I suspect the MO would be the best choice for you, I thought I'd offer up a 'somewhere else', just in case...

The Chedi, Chiang Mai (http://www.ghmhotels.com/hotels/hote...5&section=home) opened quite recently - it's a conversion of the old British Consulate, located by the river, very near the old town.

I stayed there a little while ago, and loved the place. Rooms and service were first-class. The design is much more contemporary than the FS or MO - but (just as at the Chedi property in Phuket) there were quite a few families there.

The design of the resort (rooms and suites are clustered in several buildings, rather than being spread out over many acres of land) is also much more conducive to meeting people - so if you are looking to mingle, then it might well be the best place.

http://www.srcf.ucam.org/~emdr2/chiangmai1.jpg
http://www.srcf.ucam.org/~emdr2/chiangmai2.jpg