Iโve found word of mouth is by far the best toolโฆ searching and reading blogs is second to that, but there are a few directories:
http://coworkingmap.org/
Itโs pretty, but umโฆ zoom in on Ubud, nothingโฆ zoom in on Bangkok, nothingโฆ zoom in on Chiang Mai, one space I havenโt even heard of and Iโve spent 12+ months in CM in the last couple years. Maybe itโs better for US/EU.
http://www.coworkingvisamap.com/
Same problemโฆ
Several years ago Iโd have pointed you to the only source: http://wiki.coworking.org/w/page/29303049/Directory
But I stopped even looking thereโฆ Similar reasons, maybe someoneโs updated it in the last couple years, itโs a wiki after allโฆ
I think this should be @levelsioโs next project! (fair warning, Iโve been thinking about building something like that far a while, Level seems to move a hell of a lot faster than me though)