I'm in the spot instead of wash camp for movers as well. As was mentioned sharper beams define movement better and allow you to keep that narrower beam confined to the dance floor. The wash is ok for younger events where it's predominantly standing, but if you have more formal dinner and dancing type events I don't want the wash on them at all. It's annoying as a seated guest who may be trying to watch and enjoy the event in their own way. I think we've all been to weddings etc where it was very aggravating to try and watch the goings on with the lighting shining or strobing directly in your face. As someone also mentioned, LED is even more annoying direct on than incandescent or halogen.
It's best to keep it on the dance floor or up at the ceiling as much as possible imo. Ok.........rant over.