I recently purchased an On-Stage Bluetooth headset to use when recording (I don't mix with headphones).  I was skeptical and bought them at a site that has easy returns.  However, I'm impressed and will keep the headset.  It was just about the cheapest one I could find, because I wasn't sure they would work, but the On-Stage seems to work well. 
 
I also purchased a Bluetooth transmitter that connects directly to an analog port (I'm using one headset port on my headset amp). 
 
 

care to share what you got?

The headset is On Stage BH4500
http://www.americanmusical.com/Item--i-MUS-BH4500
 
The bluetooth transmitter was from Amazon. 
http://www.amazon.com/gp/product/B016BIEON8?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
 
 

So could you possibly get Three units and set up 6 sets of headphones?  Just route the input of the headphone amp to this device?  This would fix a lot of issues with headphone cords...

I can't answer that.  The device I have will support two headsets.  I don't know if another, of the same brand, would support two different headsets.

So they have no latency issues while recording?
 
I would think there was no way to overcome latency with blue tooth cans while recording. 
 
For listening I imagine they are fine. If they dont have latency I am interested how to set up in ears for our drummer with live monitoring  
 
 

I was totally disapointed. I payed $80 for a set of Sony's, and another $50 for what claimed to be the lowest latency transmiter / reciever --they sound great and work like a charm for playback. But there can be 50-150 ms of delay. So forget about them for a studio they will never work. 
I was excited about the transmiter/ recievers as they had the potential to be used for in ear monitoring,, nope. 

Cactus Music
I was totally disapointed. I payed $80 for a set of Sony's, and another $50 for what claimed to be the lowest latency transmiter / reciever --they sound great and work like a charm for playback. But there can be 50-150 ms of delay. So forget about them for a studio they will never work. 
I was excited about the transmiter/ recievers as they had the potential to be used for in ear monitoring,, nope. 

That's what I would expect from ANY  Blue tooth  trying to record with it .. You just can't. Not yet anyway.   

I did some "in depth" recording tests this morning with the Bluetooth headset and there is latency. Enough that I'm now going to agree its no good for recording.

Initial "quick" tests were OK, but after getting into it I have a different opinion.

Actually playing along and recording with a previously recorded project I was in time with the music. But, there is a definite delay between picking a note and hearing it. That delay can confuse things.
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