I had a manager offer to put on a work hackathon. It was going to be 24 hours of design and code. I figured it would be fun, even if we were building something for the company, free reign micro project would be cool.. We ended up spending the time building something management wanted, and then playing poker. (I don't gamble so I was rather miffed) In the end, I think we spent about 4 hours coding up something the bosses wanted.