I guess you have seen this as it comes up with Google at the first hit, but for reference:
http://lawstreetmedia.com/issues/entert ... reography/IANAL, but I am sure you can't use the term such as "press the Macarena button" to perform the dance, but given that I assume we are talking about short movement sequences less that 3 seconds or such I doubt that this can be considered a choreography (mere "dance moves" seem to be non-copyrightable according to the article). To quote the article:
So, how exactly can you copyright choreography? First, one has to define choreography. It is not as simple as a few dance moves strung together. Instead, Martha Traylor, a legal commentator, has suggested that we define dance as the “planned movement, set into a time frame, for the benefit and enjoyment of the passive observer.”
So most likely you will not run into legal issues using some dance-moves that are somehow recognizable as part of the recent pop-culture.
But besides that, why bother? Any kind of funny movement (see T-bagging) will do, no need for a "dance". And you could also look into traditional folk dances that are in the public domain if you really want to have some reference.