Here is a better link explaining the mount.
http://taperssection.com/index.php?topic=164176.msg2055683#msg2055683Basically, you need two 45 degree elbows and about 8 inches of CPVC pipe, all 1/2 inch diameter, glue suitable for cpvc, and bit of flat black spray paint. You need to cut a slot in the elbows to run your cable through. For that, a grinding wheel in a dremel tool works. A thin curf cutoff blade in an angle grinder is even faster (wear eye protection). The mics will be a bit loose in the elbows, and to snug them up, glue in a bit of felt or something similar to take up the slack. Seems like I stuck a 3/8 inch bolt in each elbow to hold the felt in place until it dried.
Typically, a coupler is added to the middle to make it thick enough for the whole mount to fit in a shock mount on a mic stand.
I'm not quite sure how you want to mount this to the ceiling. A support wire with some fishing line to hold it in the correct orientation might work. You will want to be able to orient the mics in the mount at a downward angle towards the source of the music as needed.
What is the ceiling in the club? What is there to work with?
edit: photo of possible way of mounting depending on how far down from the ceiling you need to get. Rigging a cable off the ceiling is probably easier and cheaper.