A friend of mine recently sent me this video and thought it would make a fun mixer for club. I completely agree!
The Flamingo Mixer
Show this clip in club, then have everyone pretend to be a flamingo. Last one standing wins. You might want to have a few different rounds so the big kids and the little kids aren't going at the same time. Encourage folks to follow the spirit of the video and 'play nice.' Consider having refs with whistles and throwing people out if they get too rough. Anytime you can use whistles, do it.