I pre-tape a full water pistol under the conference table just for meetings like this. Every once in a while, after about 5 minutes of kill-me-now, I reach for the trigger subtly. Squeeze it, bring my hand back up, wait a few, my other hand, repeat, rinse.
This works best when a pitcher of water and half filled water glasses are waiting on the table prior to the meeting starting,
Arrange for this - dont be the water boy here.
After about a minute to 10 minutes goes by, one by one, two or thre people across from me notice the crotch is damp.