Hey, looks like you haven't been on recently but hope you see this...
I go to Chung Dam occasionally, maybe once every couple of months, usually in the evening/night. Every time is different. Usually there is some action but some nights it is very clique-y. And the other poster is right: it all depends on the "guards." Some are constantly coming into the wet area, some hardly at all. And yeah, the steam room is the best place to play. One time there were maybe 7 or 8 guys in there who all helped each other out.
LMK if you wanna visit and we'll see if our schedules align.