Was at a couple of &quot;internal&quot; hackatons ran by my employer as a part of the offsite all hands meeting. 
There was plenty of corporate politics involved with judging, other than that it was time well spent.<p>The angle was to bring new ideas to the table and build an MVP&#x2F;POC to demo the idea. Overall was a positive experience other than the politics involved.<p>The event was voluntary, took place in the hotel with beer in the hotel bar and nice catered lunches.