Wording For Dance Only Invites

I recently was married and we had a destination wedding with immediate family in attendence. We are having a reception now that we are back to celebrate with family and friends. I need help on how to word invitations to invite guest to the dance only. We have a large guest list and cannot afford to feed everyone. Most of the people for the dance only are Co-workers as we work in a large factory and know many people. What is the proper way without offending anyone to word this type of invitation?