You've never heard of TPR, I take it? It's a linguistic tool developed by Dr James J Asher and involves using physical responses to learn and internalise a foreign language and is used all over the world with both young learners and adults to solidify language learning. I personally don't dance for my students, but there is a methodology whereby dancing (actions to music) can help teach grammar points and vocabulary. There is a very effective 'dance' for example that teaches frequency adverbs. TPR is especially good for students who favour kinesthetic learning.What has dancing to do with teaching, especially at the work place?
Another example would be using popular songs that your students already know and altering the lyrics. I know a particularly good one for comparatives to the tune of 'Fighter' by Cristina Aguilera, the language is easier for the students to remember when put to music they already recognise. This is another time that actions to a song (dancing) can be helpful in learning new language or structure.
There is a methodology behind it and it's something that (again) you are simply ignorant of... And no doubt you will remain so out of choice rather than concede there are elements to language learning that (gasp) I know more about than you do, and will instead conveniently ignore the many, many studies done in to TPR that proves it's effectiveness, in favour of making a tired joke about dancing. Ho hum.
On the off chance you want to enlighten yourself, here's a link to the wiki page about TPR http://en.wikipedia.org/wiki/Total_physical_response