What is wrong with people?!?! Everything about this is wrong. Mandatory participation sounds like something in North Korea. It reminds me of an apartment complex I looked at. They had a recreation fee for the pool, tennis court, etc. I asked if I could pass on the use of those facilities and not pay the fee but it was mandatory. There should be a list of words that cannot be preceded by mandatory. Not to mention karaoke is best enjoyed at a level of inebriation far beyond what should occur at a work event.