BKK has 2 lounges for ST elite plus members. China airlines dynasty lounge and KLM crown lounge. So there is no need to put a sky-team joint lounge in. I relise they might not be always open at the same times. But i am pretty sure 1 or the other would be open at any times. I know the CI lounge is usually open in the late evening 10pm-3am, 6am-6pm. So i think its mostly covered.

Turkey on the other hand probably doesn't have any lounges which are managed by sky-team airlines, hence they decide to do a joint operation.

I would say Australian top 3 airports Sydney,Melbourne and Brisbane need the sky-team joint lounges. (Sydney lounge is being built)