Scandinavian SCM day

How can you justify "being away from work for 4 hours":

In a work context it is not unusual to have to consider the Return-on-Investment of proposed activities. What is the short- or long-term value that a certain thing will bring to the person, the project or the company? Leaving your company for a whole day to enjoy yourself at the Scandinavian SCM day for many participants need more reasoning than "I like to hang out with a group of cool people".

So, what could you get out of participating in the Scandinavian SCM day?