Marte & I have done this a few times now. She playes the violin on top of some electronic music I play.
Last night we were hired in to do so at the norwegian engineer company Aker's x-mas bash. We got all dressed up, in sparkly dresses, and had fun, and forgot to take ix. It's always interesting to do this unexpected performance in front of lots of different audiences. This time it was men in suits, and dressed up women. A nice crowd, working for this big company.