I have come up with a wonderful idea! I am not so sure it has been thought of before.
But all of the lovely women out there--and the occasional man--asking for a partner to engage in practice battle otherwise known as 'sparring' ought to do it together.
Then you will all have partners all the time. I think it should be a happy occasion! Unless you all somehow dislike each other, then it might run the risk that one or two of you may die.