I was to two weddings at the same outdoor location, one rented a dance floor that was very uneven, and lumpy even though the ground was flat. It was slippery to begin with then someone spilled a little of their drink and people actually fell. The other didn't rent a dance floor and there were no problems with it. I would just maybe spread the word that they will be ont he grass so they think twice about those spike stilettos.
we're having an outside ceremony, and the reception immediately following--- all on the grass. we didn't rent a dance floor either, so we'll just be dancing on the grass as well. I just made a note on my wedding website about it, so people know ahead of time.
Re: Dancing on the Grass?