I find Plask’s Dance Challenge “SUBMIT YOUR DANCE MOVES”. Plask makes it easy for anyone to create motion capture.
Check out the video in the link for all the info on how to participate!
Using Blender for refining your animation is great idea.
And the best part? A 3-month MoCap Pro license is up for grabs to the winners.
https://www.instagram.com/p/Cn6HIF6jaBb/