This is designed to help warm up a new group of people who don't yet know each other's names.
Stand in a circle
The facilitator starts by describing the activity and then demonstrating. Each person will say his/her first name followed by a dance move. The rest of the group imitates the move, while repeating the person's name 3 times (e.g. "Joe!, Joe!, Joe!" while doing the sprinkler dance - example video). The kinesthetic motion and repetition help people remember the names, and everyone ends up laughing.
Most groups are a little shy about this, so it's important the facilitator do a fun move to demonstrate. If you need some inspiration, see ZeFrank's How to Dance Properly.